From 84e28bd0f04e271498d031856436b00152c1ae0d Mon Sep 17 00:00:00 2001
From: Kristofer Koishigawa <scissorsneedfoodtoo@gmail.com>
Date: Fri, 8 Feb 2019 15:37:46 +0900
Subject: [PATCH] fix(challenges): update required links for d3 challenges
 (#34477)

---
 .../challenges/_meta/data-visualization-with-d3/meta.json   | 6 +++++-
 .../add-a-hover-effect-to-a-d3-element.arabic.md            | 2 --
 .../add-a-tooltip-to-a-d3-element.arabic.md                 | 2 --
 .../add-attributes-to-the-circle-elements.arabic.md         | 2 --
 .../add-axes-to-a-visualization.arabic.md                   | 2 --
 .../add-classes-with-d3.arabic.md                           | 2 --
 .../add-document-elements-with-d3.arabic.md                 | 2 --
 .../add-inline-styling-to-elements.arabic.md                | 2 --
 .../add-labels-to-d3-elements.arabic.md                     | 2 --
 .../add-labels-to-scatter-plot-circles.arabic.md            | 2 --
 .../change-styles-based-on-data.arabic.md                   | 2 --
 .../change-the-color-of-an-svg-element.arabic.md            | 2 --
 .../change-the-presentation-of-a-bar-chart.arabic.md        | 2 --
 .../create-a-bar-for-each-data-point-in-the-set.arabic.md   | 2 --
 .../create-a-linear-scale-with-d3.arabic.md                 | 2 --
 .../create-a-scatterplot-with-svg-circles.arabic.md         | 2 --
 .../display-shapes-with-svg.arabic.md                       | 2 --
 .../dynamically-change-the-height-of-each-bar.arabic.md     | 2 --
 .../dynamically-set-the-coordinates-for-each-bar.arabic.md  | 2 --
 .../invert-svg-elements.arabic.md                           | 2 --
 .../learn-about-svg-in-d3.arabic.md                         | 2 --
 .../select-a-group-of-elements-with-d3.arabic.md            | 2 --
 .../set-a-domain-and-a-range-on-a-scale.arabic.md           | 2 --
 .../data-visualization-with-d3/style-d3-labels.arabic.md    | 2 --
 .../update-the-height-of-an-element-dynamically.arabic.md   | 2 --
 .../use-a-pre-defined-scale-to-place-elements.arabic.md     | 2 --
 .../data-visualization-with-d3/use-dynamic-scales.arabic.md | 2 --
 ...o-find-minimum-and-maximum-values-in-a-dataset.arabic.md | 2 --
 .../work-with-data-in-d3.arabic.md                          | 2 --
 .../work-with-dynamic-data-in-d3.arabic.md                  | 2 --
 .../add-a-hover-effect-to-a-d3-element.chinese.md           | 2 --
 .../add-a-tooltip-to-a-d3-element.chinese.md                | 2 --
 .../add-attributes-to-the-circle-elements.chinese.md        | 2 --
 .../add-axes-to-a-visualization.chinese.md                  | 2 --
 .../add-classes-with-d3.chinese.md                          | 2 --
 .../add-document-elements-with-d3.chinese.md                | 2 --
 .../add-inline-styling-to-elements.chinese.md               | 2 --
 .../add-labels-to-d3-elements.chinese.md                    | 2 --
 .../add-labels-to-scatter-plot-circles.chinese.md           | 2 --
 .../change-styles-based-on-data.chinese.md                  | 2 --
 .../change-the-color-of-an-svg-element.chinese.md           | 2 --
 .../change-the-presentation-of-a-bar-chart.chinese.md       | 2 --
 .../create-a-bar-for-each-data-point-in-the-set.chinese.md  | 2 --
 .../create-a-linear-scale-with-d3.chinese.md                | 2 --
 .../create-a-scatterplot-with-svg-circles.chinese.md        | 2 --
 .../display-shapes-with-svg.chinese.md                      | 2 --
 .../dynamically-change-the-height-of-each-bar.chinese.md    | 2 --
 .../dynamically-set-the-coordinates-for-each-bar.chinese.md | 2 --
 .../invert-svg-elements.chinese.md                          | 2 --
 .../learn-about-svg-in-d3.chinese.md                        | 2 --
 .../select-a-group-of-elements-with-d3.chinese.md           | 2 --
 .../set-a-domain-and-a-range-on-a-scale.chinese.md          | 2 --
 .../data-visualization-with-d3/style-d3-labels.chinese.md   | 2 --
 .../update-the-height-of-an-element-dynamically.chinese.md  | 2 --
 .../use-a-pre-defined-scale-to-place-elements.chinese.md    | 2 --
 .../use-dynamic-scales.chinese.md                           | 2 --
 ...-find-minimum-and-maximum-values-in-a-dataset.chinese.md | 2 --
 .../work-with-data-in-d3.chinese.md                         | 2 --
 .../work-with-dynamic-data-in-d3.chinese.md                 | 2 --
 .../add-a-hover-effect-to-a-d3-element.english.md           | 2 --
 .../add-a-tooltip-to-a-d3-element.english.md                | 2 --
 .../add-attributes-to-the-circle-elements.english.md        | 2 --
 .../add-axes-to-a-visualization.english.md                  | 2 --
 .../add-classes-with-d3.english.md                          | 2 --
 .../add-document-elements-with-d3.english.md                | 2 --
 .../add-inline-styling-to-elements.english.md               | 2 --
 .../add-labels-to-d3-elements.english.md                    | 2 --
 .../add-labels-to-scatter-plot-circles.english.md           | 2 --
 .../change-styles-based-on-data.english.md                  | 2 --
 .../change-the-color-of-an-svg-element.english.md           | 2 --
 .../change-the-presentation-of-a-bar-chart.english.md       | 2 --
 .../create-a-bar-for-each-data-point-in-the-set.english.md  | 2 --
 .../create-a-linear-scale-with-d3.english.md                | 2 --
 .../create-a-scatterplot-with-svg-circles.english.md        | 2 --
 .../display-shapes-with-svg.english.md                      | 2 --
 .../dynamically-change-the-height-of-each-bar.english.md    | 2 --
 .../dynamically-set-the-coordinates-for-each-bar.english.md | 2 --
 .../invert-svg-elements.english.md                          | 2 --
 .../learn-about-svg-in-d3.english.md                        | 2 --
 .../select-a-group-of-elements-with-d3.english.md           | 2 --
 .../set-a-domain-and-a-range-on-a-scale.english.md          | 2 --
 .../data-visualization-with-d3/style-d3-labels.english.md   | 2 --
 .../update-the-height-of-an-element-dynamically.english.md  | 2 --
 .../use-a-pre-defined-scale-to-place-elements.english.md    | 2 --
 .../use-dynamic-scales.english.md                           | 2 --
 ...-find-minimum-and-maximum-values-in-a-dataset.english.md | 2 --
 .../work-with-data-in-d3.english.md                         | 2 --
 .../work-with-dynamic-data-in-d3.english.md                 | 2 --
 .../add-a-hover-effect-to-a-d3-element.portuguese.md        | 2 --
 .../add-a-tooltip-to-a-d3-element.portuguese.md             | 2 --
 .../add-attributes-to-the-circle-elements.portuguese.md     | 2 --
 .../add-axes-to-a-visualization.portuguese.md               | 2 --
 .../add-classes-with-d3.portuguese.md                       | 2 --
 .../add-document-elements-with-d3.portuguese.md             | 2 --
 .../add-inline-styling-to-elements.portuguese.md            | 2 --
 .../add-labels-to-d3-elements.portuguese.md                 | 2 --
 .../add-labels-to-scatter-plot-circles.portuguese.md        | 2 --
 .../change-styles-based-on-data.portuguese.md               | 2 --
 .../change-the-color-of-an-svg-element.portuguese.md        | 2 --
 .../change-the-presentation-of-a-bar-chart.portuguese.md    | 2 --
 ...reate-a-bar-for-each-data-point-in-the-set.portuguese.md | 2 --
 .../create-a-linear-scale-with-d3.portuguese.md             | 2 --
 .../create-a-scatterplot-with-svg-circles.portuguese.md     | 2 --
 .../display-shapes-with-svg.portuguese.md                   | 2 --
 .../dynamically-change-the-height-of-each-bar.portuguese.md | 2 --
 ...namically-set-the-coordinates-for-each-bar.portuguese.md | 2 --
 .../invert-svg-elements.portuguese.md                       | 2 --
 .../learn-about-svg-in-d3.portuguese.md                     | 2 --
 .../select-a-group-of-elements-with-d3.portuguese.md        | 2 --
 .../set-a-domain-and-a-range-on-a-scale.portuguese.md       | 2 --
 .../style-d3-labels.portuguese.md                           | 2 --
 ...pdate-the-height-of-an-element-dynamically.portuguese.md | 2 --
 .../use-a-pre-defined-scale-to-place-elements.portuguese.md | 2 --
 .../use-dynamic-scales.portuguese.md                        | 2 --
 ...nd-minimum-and-maximum-values-in-a-dataset.portuguese.md | 2 --
 .../work-with-data-in-d3.portuguese.md                      | 2 --
 .../work-with-dynamic-data-in-d3.portuguese.md              | 2 --
 .../add-a-hover-effect-to-a-d3-element.russian.md           | 2 --
 .../add-a-tooltip-to-a-d3-element.russian.md                | 2 --
 .../add-attributes-to-the-circle-elements.russian.md        | 2 --
 .../add-axes-to-a-visualization.russian.md                  | 2 --
 .../add-classes-with-d3.russian.md                          | 2 --
 .../add-document-elements-with-d3.russian.md                | 2 --
 .../add-inline-styling-to-elements.russian.md               | 2 --
 .../add-labels-to-d3-elements.russian.md                    | 2 --
 .../add-labels-to-scatter-plot-circles.russian.md           | 2 --
 .../change-styles-based-on-data.russian.md                  | 2 --
 .../change-the-color-of-an-svg-element.russian.md           | 2 --
 .../change-the-presentation-of-a-bar-chart.russian.md       | 2 --
 .../create-a-bar-for-each-data-point-in-the-set.russian.md  | 2 --
 .../create-a-linear-scale-with-d3.russian.md                | 2 --
 .../create-a-scatterplot-with-svg-circles.russian.md        | 2 --
 .../display-shapes-with-svg.russian.md                      | 2 --
 .../dynamically-change-the-height-of-each-bar.russian.md    | 2 --
 .../dynamically-set-the-coordinates-for-each-bar.russian.md | 2 --
 .../invert-svg-elements.russian.md                          | 2 --
 .../learn-about-svg-in-d3.russian.md                        | 2 --
 .../select-a-group-of-elements-with-d3.russian.md           | 2 --
 .../set-a-domain-and-a-range-on-a-scale.russian.md          | 2 --
 .../data-visualization-with-d3/style-d3-labels.russian.md   | 2 --
 .../update-the-height-of-an-element-dynamically.russian.md  | 2 --
 .../use-a-pre-defined-scale-to-place-elements.russian.md    | 2 --
 .../use-dynamic-scales.russian.md                           | 2 --
 ...-find-minimum-and-maximum-values-in-a-dataset.russian.md | 2 --
 .../work-with-data-in-d3.russian.md                         | 2 --
 .../work-with-dynamic-data-in-d3.russian.md                 | 2 --
 .../add-a-hover-effect-to-a-d3-element.spanish.md           | 2 --
 .../add-a-tooltip-to-a-d3-element.spanish.md                | 2 --
 .../add-attributes-to-the-circle-elements.spanish.md        | 2 --
 .../add-axes-to-a-visualization.spanish.md                  | 2 --
 .../add-classes-with-d3.spanish.md                          | 2 --
 .../add-document-elements-with-d3.spanish.md                | 2 --
 .../add-inline-styling-to-elements.spanish.md               | 2 --
 .../add-labels-to-d3-elements.spanish.md                    | 2 --
 .../add-labels-to-scatter-plot-circles.spanish.md           | 2 --
 .../change-styles-based-on-data.spanish.md                  | 2 --
 .../change-the-color-of-an-svg-element.spanish.md           | 2 --
 .../change-the-presentation-of-a-bar-chart.spanish.md       | 2 --
 .../create-a-bar-for-each-data-point-in-the-set.spanish.md  | 2 --
 .../create-a-linear-scale-with-d3.spanish.md                | 2 --
 .../create-a-scatterplot-with-svg-circles.spanish.md        | 2 --
 .../display-shapes-with-svg.spanish.md                      | 2 --
 .../dynamically-change-the-height-of-each-bar.spanish.md    | 2 --
 .../dynamically-set-the-coordinates-for-each-bar.spanish.md | 2 --
 .../invert-svg-elements.spanish.md                          | 2 --
 .../learn-about-svg-in-d3.spanish.md                        | 2 --
 .../select-a-group-of-elements-with-d3.spanish.md           | 2 --
 .../set-a-domain-and-a-range-on-a-scale.spanish.md          | 2 --
 .../data-visualization-with-d3/style-d3-labels.spanish.md   | 2 --
 .../update-the-height-of-an-element-dynamically.spanish.md  | 2 --
 .../use-a-pre-defined-scale-to-place-elements.spanish.md    | 2 --
 .../use-dynamic-scales.spanish.md                           | 2 --
 ...-find-minimum-and-maximum-values-in-a-dataset.spanish.md | 2 --
 .../work-with-data-in-d3.spanish.md                         | 2 --
 .../work-with-dynamic-data-in-d3.spanish.md                 | 2 --
 175 files changed, 5 insertions(+), 349 deletions(-)

diff --git a/curriculum/challenges/_meta/data-visualization-with-d3/meta.json b/curriculum/challenges/_meta/data-visualization-with-d3/meta.json
index 8eedb0ec63..ccc92a0e62 100644
--- a/curriculum/challenges/_meta/data-visualization-with-d3/meta.json
+++ b/curriculum/challenges/_meta/data-visualization-with-d3/meta.json
@@ -4,7 +4,11 @@
   "order": 1,
   "time": "5 hours",
   "template": "",
-  "required": [],
+  "required": [
+    {
+      "src": "https://cdnjs.cloudflare.com/ajax/libs/d3/5.7.0/d3.min.js"
+    }
+  ],
   "superBlock": "data-visualization",
   "superOrder": 4,
   "challengeOrder": [
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.arabic.md
index 6399588a00..346969d3cb 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd4
 title: Add a Hover Effect to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.arabic.md
index d7a3bc3ded..498ab51ca8 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd6
 title: Add a Tooltip to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.arabic.md
index a7fffcc767..311b750428 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd8
 title: Add Attributes to the Circle Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.arabic.md
index 3e58930ec6..d2d93308ab 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fad367417b2b2512bdf
 title: Add Axes to a Visualization
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.arabic.md
index efdd5a0127..e21db637a7 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc8
 title: Add Classes with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.arabic.md
index df42cf71f7..7e19cc9c1c 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc2
 title: Add Document Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.arabic.md
index 3162cb253a..0100a752a3 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc6
 title: Add Inline Styling to Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: إضافة التصميم الداخلي للعناصر
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.arabic.md
index e2a949e106..19cdc383a7 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd2
 title: Add Labels to D3 Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: أضف تسميات لعناصر D3
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.arabic.md
index c20513bc06..4e58726d22 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd9
 title: Add Labels to Scatter Plot Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.arabic.md
index 9377f5b398..de7d4e2451 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc7
 title: Change Styles Based on Data
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.arabic.md
index d40d570103..9789d1382d 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd1
 title: Change the Color of an SVG Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.arabic.md
index 06e2039aa0..fe42d88cf8 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bca
 title: Change the Presentation of a Bar Chart
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.arabic.md
index c355b65d74..59f0a9bc48 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcd
 title: Create a Bar for Each Data Point in the Set
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.arabic.md
index 7be4980baf..d7e620fba5 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bda
 title: Create a Linear Scale with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.arabic.md
index 19589f9011..ac3974cc52 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd7
 title: Create a Scatterplot with SVG Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.arabic.md
index 86f6462b51..10a2cfe162 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcc
 title: Display Shapes with SVG
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.arabic.md
index 4f06ee8416..3e4cbd224c 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bcf
 title: Dynamically Change the Height of Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.arabic.md
index e18cb6dfd0..f328fb8e89 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bce
 title: Dynamically Set the Coordinates for Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ديناميكيا تعيين الاحداثيات لكل شريط
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/invert-svg-elements.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/invert-svg-elements.arabic.md
index 4b18ef7e61..5da69fca5f 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/invert-svg-elements.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/invert-svg-elements.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd0
 title: Invert SVG Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: عكس عناصر SVG
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.arabic.md
index 43e3cdba18..c91d869f17 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcb
 title: Learn About SVG in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.arabic.md
index bcffb9fd2e..58f1d15537 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc3
 title: Select a Group of Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.arabic.md
index 7f5e16b272..8ebaf1d942 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdb
 title: Set a Domain and a Range on a Scale
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/style-d3-labels.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/style-d3-labels.arabic.md
index d929b9472a..e64551dcda 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/style-d3-labels.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/style-d3-labels.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd3
 title: Style D3 Labels
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.arabic.md
index cced66a704..735b2f963b 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bc9
 title: Update the Height of an Element Dynamically
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.arabic.md
index e4afd31b2d..1b2ee3241c 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bde
 title: Use a Pre-Defined Scale to Place Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: استخدم مقياس محدد مسبقا لوضع العناصر
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.arabic.md
index 501db924f7..b75d9b2db5 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdd
 title: Use Dynamic Scales
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.arabic.md
index 95fc9336c5..4adec03de2 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdc
 title: Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.arabic.md
index 90f0d92b4f..aa99664eda 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc4
 title: Work with Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.arabic.md b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.arabic.md
index d7789b7312..930914bc7e 100644
--- a/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.arabic.md
+++ b/curriculum/challenges/arabic/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.arabic.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc5
 title: Work with Dynamic Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.chinese.md
index 02d74f0a11..90a1bc8624 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd4
 title: Add a Hover Effect to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 将悬停效果添加到D3元素
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.chinese.md
index 313a87355f..931d6b4bf1 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd6
 title: Add a Tooltip to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 将工具提示添加到D3元素
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.chinese.md
index f9a8aa60ea..f142812fb2 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd8
 title: Add Attributes to the Circle Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 将属性添加到圆形元素
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.chinese.md
index 23695b0067..3fea058351 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fad367417b2b2512bdf
 title: Add Axes to a Visualization
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 将轴添加到可视化
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.chinese.md
index 8ef57ba041..292bfcf02a 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc8
 title: Add Classes with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 使用D3添加类
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.chinese.md
index 801b026116..c6847bec49 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc2
 title: Add Document Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 使用D3添加文档元素
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.chinese.md
index 5215f21cca..eac72c9b85 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc6
 title: Add Inline Styling to Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 向元素添加内联样式
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.chinese.md
index 58831c915a..a4a14f7e22 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd2
 title: Add Labels to D3 Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 将标签添加到D3元素
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.chinese.md
index fde0aa34a2..c036458e35 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd9
 title: Add Labels to Scatter Plot Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 添加标签以分散绘图圆圈
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.chinese.md
index 7561c37dab..c2bb196a10 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc7
 title: Change Styles Based on Data
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 根据数据更改样式
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.chinese.md
index 5c3a10aede..545bac140a 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd1
 title: Change the Color of an SVG Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 更改SVG元素的颜色
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.chinese.md
index b4c4a9d5f4..f388592a37 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bca
 title: Change the Presentation of a Bar Chart
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 更改条形图的演示文稿
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.chinese.md
index 04cca8ad18..c9a76d0be5 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcd
 title: Create a Bar for Each Data Point in the Set
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 为集合中的每个数据点创建一个条
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.chinese.md
index aaa631bf65..3d1fa2b16a 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bda
 title: Create a Linear Scale with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 使用D3创建线性比例
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.chinese.md
index 139b97a5b1..fcbb5fc1e9 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd7
 title: Create a Scatterplot with SVG Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 使用SVG圈创建散点图
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.chinese.md
index 9ae7bdc2f5..38fee95188 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcc
 title: Display Shapes with SVG
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 使用SVG显示形状
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.chinese.md
index eb9ed001d3..9b02bb0dc9 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bcf
 title: Dynamically Change the Height of Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 动态改变每个栏的高度
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.chinese.md
index d7a743506d..2797d4761f 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bce
 title: Dynamically Set the Coordinates for Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 动态设置每个条形的坐标
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/invert-svg-elements.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/invert-svg-elements.chinese.md
index 36ff3bd281..6db7c83ab3 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/invert-svg-elements.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/invert-svg-elements.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd0
 title: Invert SVG Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 反转SVG元素
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.chinese.md
index 84cbeeec57..9503362e4c 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcb
 title: Learn About SVG in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 在D3中了解SVG
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.chinese.md
index d1f439336b..bf81ea7812 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc3
 title: Select a Group of Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 使用D3选择一组元素
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.chinese.md
index 8228dd6c10..c9d3236215 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdb
 title: Set a Domain and a Range on a Scale
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 在比例上设置域和范围
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/style-d3-labels.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/style-d3-labels.chinese.md
index 967047d549..222e29e37a 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/style-d3-labels.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/style-d3-labels.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd3
 title: Style D3 Labels
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 风格D3标签
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.chinese.md
index 7377b3a550..8caf93424a 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bc9
 title: Update the Height of an Element Dynamically
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 动态更新元素的高度
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.chinese.md
index d46068d2dc..93f4486d05 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bde
 title: Use a Pre-Defined Scale to Place Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 使用预定义比例放置元素
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.chinese.md
index 91be27d69e..2a41f267b0 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdd
 title: Use Dynamic Scales
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 使用动态比例
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.chinese.md
index 43e339efbe..e13ef934dd 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdc
 title: Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 使用d3.max和d3.min函数查找数据集中的最小值和最大值
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.chinese.md
index 7bd7c60526..61e6749e70 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc4
 title: Work with Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 在D3中使用数据
diff --git a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.chinese.md b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.chinese.md
index 5929f0cee2..66c8a3daa0 100644
--- a/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.chinese.md
+++ b/curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.chinese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc5
 title: Work with Dynamic Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: 在D3中使用动态数据
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.english.md
index a6fb72aaa2..f2c3cdb425 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd4
 title: Add a Hover Effect to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.english.md
index 93d06839a0..90350f276f 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd6
 title: Add a Tooltip to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.english.md
index ddadc3007c..6ba248d4aa 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd8
 title: Add Attributes to the Circle Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.english.md
index 42d087d0ab..1eb2e9b725 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fad367417b2b2512bdf
 title: Add Axes to a Visualization
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.english.md
index 10206d5d79..303f838d67 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc8
 title: Add Classes with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.english.md
index 20dff1092f..85984c0f42 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc2
 title: Add Document Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.english.md
index 8333cf989a..6f400cb7ff 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc6
 title: Add Inline Styling to Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.english.md
index ed0847be78..21134d3023 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd2
 title: Add Labels to D3 Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.english.md
index f0a0fdc518..41b0d7b042 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd9
 title: Add Labels to Scatter Plot Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.english.md
index 1ca6f9d4ff..42733ddb55 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc7
 title: Change Styles Based on Data
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.english.md
index 77d8f48a59..4c54920ad7 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd1
 title: Change the Color of an SVG Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.english.md
index 4edc4f1135..b22c873866 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bca
 title: Change the Presentation of a Bar Chart
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.english.md
index 26f6cb586c..bd659ee887 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcd
 title: Create a Bar for Each Data Point in the Set
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.english.md
index 432a538273..796727ce1f 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bda
 title: Create a Linear Scale with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.english.md
index 193af7f4a1..1ac1fd5e73 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd7
 title: Create a Scatterplot with SVG Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.english.md
index 98f442a9e8..ea64f28360 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcc
 title: Display Shapes with SVG
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.english.md
index d6374d7156..44953d2e7d 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bcf
 title: Dynamically Change the Height of Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.english.md
index 218aee9f0c..753ad4d45d 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bce
 title: Dynamically Set the Coordinates for Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/invert-svg-elements.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/invert-svg-elements.english.md
index 30d1731c2f..97eb924a32 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/invert-svg-elements.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/invert-svg-elements.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd0
 title: Invert SVG Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.english.md
index ed43c985d7..7e098e0e5e 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcb
 title: Learn About SVG in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.english.md
index 82b5244f91..9f30dc2692 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc3
 title: Select a Group of Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md
index 96df8032d1..b326b69900 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdb
 title: Set a Domain and a Range on a Scale
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/style-d3-labels.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/style-d3-labels.english.md
index bf7bf27a85..67c6baaf37 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/style-d3-labels.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/style-d3-labels.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd3
 title: Style D3 Labels
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.english.md
index 20168f71c3..f64924271a 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bc9
 title: Update the Height of an Element Dynamically
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.english.md
index 61ddc8e029..818519c8aa 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bde
 title: Use a Pre-Defined Scale to Place Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.english.md
index 9c3a833eaa..a294c22026 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdd
 title: Use Dynamic Scales
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.english.md
index baaaf664d4..b5966d8aaa 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdc
 title: Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.english.md
index 0941e842af..458d118202 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc4
 title: Work with Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.english.md
index 139a4800bc..22d75af037 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.english.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc5
 title: Work with Dynamic Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 ---
 
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.portuguese.md
index 0c59d21c3b..ff4dd87353 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd4
 title: Add a Hover Effect to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Adicionar um efeito de foco a um elemento D3
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.portuguese.md
index 8f9e1582c1..348540a7b4 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd6
 title: Add a Tooltip to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Adicionar uma dica de ferramenta a um elemento D3
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.portuguese.md
index 82f454afac..cb605c2763 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd8
 title: Add Attributes to the Circle Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Adicionar atributos aos elementos do círculo
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.portuguese.md
index ea84f71981..4112a52bff 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fad367417b2b2512bdf
 title: Add Axes to a Visualization
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Adicionar eixos a uma visualização
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.portuguese.md
index 5dfbd79ea9..35fb080ec6 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc8
 title: Add Classes with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: ''
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.portuguese.md
index a8202d7876..eac0dd86ca 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc2
 title: Add Document Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Adicionar elementos do documento com D3
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.portuguese.md
index f01aa23201..4c212d4dcc 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc6
 title: Add Inline Styling to Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Adicionar estilo inline aos elementos
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.portuguese.md
index ef649a614f..3637bf6718 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd2
 title: Add Labels to D3 Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Adicionar rótulos aos elementos D3
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.portuguese.md
index c2dce8c9de..6b2eedcdda 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd9
 title: Add Labels to Scatter Plot Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Adicionar rótulos aos círculos de plotagem de dispersão
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.portuguese.md
index b34caf3b93..d6422df7f0 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc7
 title: Change Styles Based on Data
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Alterar estilos com base em dados
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.portuguese.md
index 0e7e226cc8..de08672c6d 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd1
 title: Change the Color of an SVG Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Alterar a cor de um elemento SVG
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.portuguese.md
index 14db89186f..abe83b229d 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bca
 title: Change the Presentation of a Bar Chart
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Alterar a apresentação de um gráfico de barras
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.portuguese.md
index 134e988839..f761d2e4a9 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcd
 title: Create a Bar for Each Data Point in the Set
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Crie uma barra para cada ponto de dados no conjunto
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.portuguese.md
index 2c4a1b1fe9..8088a24e81 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bda
 title: Create a Linear Scale with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Crie uma escala linear com D3
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.portuguese.md
index 2c445c578d..c31deef8db 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd7
 title: Create a Scatterplot with SVG Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Criar um gráfico de dispersão com círculos SVG
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.portuguese.md
index e12f8e4d3c..59fe524251 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcc
 title: Display Shapes with SVG
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Exibir formas com SVG
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.portuguese.md
index 45face2e02..653e4243b9 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bcf
 title: Dynamically Change the Height of Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Alterar dinamicamente a altura de cada barra
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.portuguese.md
index 5b4a58bd1d..025490a43a 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bce
 title: Dynamically Set the Coordinates for Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Definir dinamicamente as coordenadas para cada barra
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/invert-svg-elements.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/invert-svg-elements.portuguese.md
index 57e6287ed1..e506ee89b7 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/invert-svg-elements.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/invert-svg-elements.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd0
 title: Invert SVG Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Inverter elementos SVG
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.portuguese.md
index b2d9773fb8..052b679c44 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcb
 title: Learn About SVG in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Aprenda sobre o SVG no D3
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.portuguese.md
index f9f2f9c586..1ce72ecdbd 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc3
 title: Select a Group of Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Selecione um grupo de elementos com D3
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.portuguese.md
index 12d7407c3c..3f721a8903 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdb
 title: Set a Domain and a Range on a Scale
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Definir um domínio e um intervalo em escala
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/style-d3-labels.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/style-d3-labels.portuguese.md
index 388b1e3768..6bbae5ffb8 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/style-d3-labels.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/style-d3-labels.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd3
 title: Style D3 Labels
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Etiquetas do estilo D3
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.portuguese.md
index 682f6e8b23..37a90df3b7 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bc9
 title: Update the Height of an Element Dynamically
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Atualizar a Altura de um Elemento Dinamicamente
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.portuguese.md
index 70310f1d89..2a8f738f42 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bde
 title: Use a Pre-Defined Scale to Place Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Use uma escala pré-definida para colocar elementos
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.portuguese.md
index 48308ee41f..ad4c60af6e 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdd
 title: Use Dynamic Scales
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Use escalas dinâmicas
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.portuguese.md
index 515cc5db0c..366560e084 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdc
 title: Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Use as funções d3.max e d3.min para localizar valores mínimos e máximos em um conjunto de dados
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.portuguese.md
index 0f4e04344a..a629f9b485 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc4
 title: Work with Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Trabalhar com dados no D3
diff --git a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.portuguese.md b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.portuguese.md
index 07ee117faf..1432a955c5 100644
--- a/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.portuguese.md
+++ b/curriculum/challenges/portuguese/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.portuguese.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc5
 title: Work with Dynamic Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Trabalhar com dados dinâmicos no D3
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.russian.md
index 772109028e..bbbe5eefb8 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd4
 title: Add a Hover Effect to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Добавить эффект наведения на элемент D3
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.russian.md
index 8b3ae6af34..e00b3d9acf 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd6
 title: Add a Tooltip to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Добавление всплывающей подсказки к элементу D3
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.russian.md
index 0187cfe766..191e11c77c 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd8
 title: Add Attributes to the Circle Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Добавить атрибуты элементов круга
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.russian.md
index 41b1597d0a..f92b6a88b5 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fad367417b2b2512bdf
 title: Add Axes to a Visualization
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Добавление осей к визуализации
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.russian.md
index 3e69b80592..8413b7546b 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc8
 title: Add Classes with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Добавить классы с D3
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.russian.md
index c2e4e1cbdb..6a9e6bd63d 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc2
 title: Add Document Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Добавление элементов документа с помощью D3
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.russian.md
index b9aea759a0..57c6224961 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc6
 title: Add Inline Styling to Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Добавить встроенный стиль в элементы
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.russian.md
index d35c3f6eee..cb49c56211 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd2
 title: Add Labels to D3 Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Добавить ярлыки в элементы D3
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.russian.md
index 65cefc3cdd..0111778076 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd9
 title: Add Labels to Scatter Plot Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Добавить ярлыки в круги кругов рассеяния
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.russian.md
index 7740b6fe6d..7b186de491 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc7
 title: Change Styles Based on Data
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Изменение стилей на основе данных
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.russian.md
index 7458a85b30..3cc17d1b6c 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd1
 title: Change the Color of an SVG Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Изменение цвета элемента SVG
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.russian.md
index c8e56a437d..70cd4bc519 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bca
 title: Change the Presentation of a Bar Chart
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Изменение презентации диаграммы
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.russian.md
index c127014672..70c01ce797 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcd
 title: Create a Bar for Each Data Point in the Set
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Создайте панель для каждой точки данных в наборе
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.russian.md
index 4cb4dd4e9d..ea1687a308 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bda
 title: Create a Linear Scale with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Создайте линейную шкалу с D3
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.russian.md
index aa5021a9e0..72c04b03b6 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd7
 title: Create a Scatterplot with SVG Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Создайте Scatterplot с кругами SVG
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.russian.md
index f7b8d7baed..7693fe94aa 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcc
 title: Display Shapes with SVG
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Отображать фигуры с помощью SVG
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.russian.md
index 5091b517d2..991079b5c0 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bcf
 title: Dynamically Change the Height of Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Динамическое изменение высоты каждой панели
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.russian.md
index 7122127360..01aab00a8b 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bce
 title: Dynamically Set the Coordinates for Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Динамически устанавливать координаты для каждого бара
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/invert-svg-elements.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/invert-svg-elements.russian.md
index cc2d363b17..1ed687c2b5 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/invert-svg-elements.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/invert-svg-elements.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd0
 title: Invert SVG Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Инвертировать элементы SVG
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.russian.md
index 67602a808a..97e92aadd9 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcb
 title: Learn About SVG in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Узнайте о SVG в D3
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.russian.md
index 9b7981609f..dfe39a84d5 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc3
 title: Select a Group of Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Выберите группу элементов с D3
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.russian.md
index 51eef76195..152f64b213 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdb
 title: Set a Domain and a Range on a Scale
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Установка домена и диапазона по шкале
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/style-d3-labels.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/style-d3-labels.russian.md
index 829c58ea0b..4f9450551c 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/style-d3-labels.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/style-d3-labels.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd3
 title: Style D3 Labels
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Стильные этикетки D3
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.russian.md
index 1b71341589..d8374476fd 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bc9
 title: Update the Height of an Element Dynamically
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Обновление высоты элемента динамически
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.russian.md
index f8e48f8c20..b68152d4b7 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bde
 title: Use a Pre-Defined Scale to Place Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Используйте предварительно заданную шкалу для размещения элементов
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.russian.md
index d97bda96af..a49fd3d8f8 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdd
 title: Use Dynamic Scales
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Использование динамических весов
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.russian.md
index dd8478978c..6a5b100bcc 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdc
 title: Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Используйте функции d3.max и d3.min для поиска минимальных и максимальных значений в наборе данных
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.russian.md
index b34bccc93a..e5291ff819 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc4
 title: Work with Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Работа с данными в D3
diff --git a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.russian.md b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.russian.md
index 94d19ba133..3fca9d7284 100644
--- a/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.russian.md
+++ b/curriculum/challenges/russian/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.russian.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc5
 title: Work with Dynamic Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Работа с динамическими данными в D3
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.spanish.md
index 6603790835..bb277d2cba 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd4
 title: Add a Hover Effect to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Añadir un efecto de desplazamiento sobre un elemento D3
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.spanish.md
index 329d794021..34b3952075 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd6
 title: Add a Tooltip to a D3 Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Añadir una información sobre herramientas a un elemento D3
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.spanish.md
index 77d41b535a..e0805bda12 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd8
 title: Add Attributes to the Circle Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Añadir atributos a los elementos del círculo
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.spanish.md
index 74d5b1b6dc..f2a0919120 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fad367417b2b2512bdf
 title: Add Axes to a Visualization
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Añadir ejes a una visualización
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.spanish.md
index 7b7637a6b6..4e5d29c2b7 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc8
 title: Add Classes with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Añadir clases con D3
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.spanish.md
index c5d884d9ea..9b0ec0ced3 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc2
 title: Add Document Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Añadir elementos de documento con D3
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.spanish.md
index 6065dea773..434b428df2 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc6
 title: Add Inline Styling to Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Añadir estilo en línea a los elementos
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.spanish.md
index e2a94d19ee..710d281fad 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd2
 title: Add Labels to D3 Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Añadir etiquetas a elementos D3
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.spanish.md
index d851e161f0..be1d213a7e 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd9
 title: Add Labels to Scatter Plot Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Añadir etiquetas a los círculos de la parcela de dispersión
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.spanish.md
index f67a234bc4..b76cdfeb3a 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc7
 title: Change Styles Based on Data
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Cambiar estilos basados ​​en datos
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.spanish.md
index 7b8ca9e7b3..be04ded8ed 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd1
 title: Change the Color of an SVG Element
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Cambiar el color de un elemento SVG
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.spanish.md
index 50779caf76..c0530e123d 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bca
 title: Change the Presentation of a Bar Chart
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Cambiar la presentación de un gráfico de barras
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.spanish.md
index 67dce6248c..0f34f1ed5a 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcd
 title: Create a Bar for Each Data Point in the Set
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Crear una barra para cada punto de datos en el conjunto
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.spanish.md
index 621b5bdaa9..e3644ad918 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bda
 title: Create a Linear Scale with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Crea una escala lineal con D3
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.spanish.md
index ad670e05f3..74905a395a 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fab367417b2b2512bd7
 title: Create a Scatterplot with SVG Circles
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Crear un diagrama de dispersión con círculos SVG
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.spanish.md
index e36069e942..d6581d3c34 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcc
 title: Display Shapes with SVG
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Mostrar formas con SVG
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.spanish.md
index 356111858f..d4a4d2cc08 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bcf
 title: Dynamically Change the Height of Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Cambiar dinámicamente la altura de cada barra
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.spanish.md
index 5028c5120d..e1ac959a1c 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bce
 title: Dynamically Set the Coordinates for Each Bar
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Establecer dinámicamente las coordenadas para cada barra
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/invert-svg-elements.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/invert-svg-elements.spanish.md
index 7813bea055..c0e140d52b 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/invert-svg-elements.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/invert-svg-elements.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa9367417b2b2512bd0
 title: Invert SVG Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Invertir elementos SVG
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.spanish.md
index 3a887956e8..0636cfa79c 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bcb
 title: Learn About SVG in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Aprende sobre SVG en D3
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.spanish.md
index 6e2f422bcc..9b21618b3e 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa6367417b2b2512bc3
 title: Select a Group of Elements with D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Seleccione un grupo de elementos con D3
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.spanish.md
index bbea965c56..1ffa1c1066 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdb
 title: Set a Domain and a Range on a Scale
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Establecer un dominio y un rango en una escala
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/style-d3-labels.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/style-d3-labels.spanish.md
index a4b59b308c..0c8787b6ce 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/style-d3-labels.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/style-d3-labels.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7faa367417b2b2512bd3
 title: Style D3 Labels
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Etiquetas de estilo D3
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.spanish.md
index 51400f47ea..91ab8b17b9 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa8367417b2b2512bc9
 title: Update the Height of an Element Dynamically
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Actualizar la altura de un elemento dinámicamente
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.spanish.md
index 054ad3c5ab..aa7088a393 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bde
 title: Use a Pre-Defined Scale to Place Elements
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Use una escala predefinida para colocar elementos
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.spanish.md
index 0316ac73e0..37ac605a59 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdd
 title: Use Dynamic Scales
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Usa escalas dinámicas
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.spanish.md
index 831109505c..c5e6f9182d 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fac367417b2b2512bdc
 title: Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Utilice las funciones d3.max y d3.min para buscar valores mínimos y máximos en un conjunto de datos
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.spanish.md
index 81f9865a81..9142651a6c 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc4
 title: Work with Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Trabajar con datos en D3
diff --git a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.spanish.md b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.spanish.md
index 36774bfd66..a1d2055d96 100644
--- a/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.spanish.md
+++ b/curriculum/challenges/spanish/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.spanish.md
@@ -1,8 +1,6 @@
 ---
 id: 587d7fa7367417b2b2512bc5
 title: Work with Dynamic Data in D3
-required:
-  - src: 'https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js'
 challengeType: 6
 videoUrl: ''
 localeTitle: Trabajar con datos dinámicos en D3