According to the Text, Why Are Women and Racial-Ethnic Minority

According to the text, why are women and racial-ethnic minority group members underrepresented in national government?

A) There is no evidence that voters would vote for a woman or member of a minority group since those groups are known to be less skilled.
B) They are disadvantaged by the power of incumbents who are generally White men.
C) There is a lack of interest among women and members of racial-ethnic minority groups in running for national offices.
D) The day-to-day roles fulfilled by women and members of minority groups preclude their participation in government.