The election of 2008 was historically significant for women because

A) one woman ran for president and one ran for vice president.

B) a third-party female candidate made a strong showing.

C) women outnumbered male candidates for the Senate.

D) women outnumbered male candidates for the House.

A) one woman ran for president and one ran for vice president.

The question is asking about the election of 2008, and specifically why was historically significant for women, in 2008 Barack Obama won, but his major Democratic opponent was Hillary Clinton - a woman. The republican candidate for Vice-President was Sarah Palin, also a woman (not the first female candidate for a vice-president though). So the correct answer is: A) one woman ran for president and one ran for vice president.