Research Cited in the Practical Skeptic Suggests That the Economic

Research cited in The Practical Skeptic suggests that the economic inequality that exists between men and women

A) is explainable in terms of differences in men's and women's work culture.
B) is a result of sexism.
C) boils down to issues of ethnicity.
D) is related to the fact that men tend to work more hours per week than do women.
E) has to do with the fact that men tend to have more education than women.