According to the Text,American Presidential Elections Seem to Last So

According to the text,American presidential elections seem to last so long chiefly because​

A) ​they are consistently held every four years.
B) ​the media spend so much time covering them.
C) ​political parties spend so many resources keeping presidential candidates in the public eye.
D) ​this is simply the way the world holds elections these days, and we are like other countries who have the same problem.
E) ​front-loading primaries makes the elections seem like they last a long time.