Recall Application 2, "Growth Need Not Cause Increased Inequality," to Answer

Recall Application 2, "Growth Need Not Cause Increased Inequality," to answer the following questions:
-According to the application, Piketty and Saez found that _______ contribute to income inequality in countries that experience growth.

A) the nature of the tax system
B) social norms
C) perceived fairness of compensation
D) All of the above are correct.