In Politics, the Term Gender Gap

In politics, the term gender gap

A) refers to the underrepresentation of women in the U.S. Senate.
B) refers to the length of time it took women to gain the right to vote.
C) describes the differences in the campaign styles of male and female candidates.
D) refers to the difference between the percentage of votes cast for a particular candidate by women and the percentage of votes cast for the same candidate by men.
E) describes the difference in voter turnout between men and women.