Update quiz1.md

myounus96 · Jul 24, 2017 · b336132 · b336132
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@@ -16,7 +16,8 @@ Which of the following is a principle of analytic graphics?
 
 Answer Options: </br>
 Integrate multiple modes of evidence </br>
-Show comparisons
+Show comparisons</br>
+Show causality, mechanism, explanation
 
 Question 2
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