When Comparing Income Levels by Education and Gender, Which of the Following

When comparing income levels by education and gender, which of the following is TRUE?

A) Men and women earn about the same income if they have the same education.
B) The difference between men and women on earnings occurs mostly at the lower education levels.
C) The difference between men and women on earnings occurs mostly at the higher education levels.
D) Men earn more than women at each level of education.
E) Women earn more than men at each level of education.