Races for the U

Races for the U.S.Senate are more competitive than House races,with a larger percentage of incumbents defeated for reelection.Which of the following reasons helps account for this fact?

A) Challengers for Senate seats are often better able to raise money and generate free publicity than are challengers for House seats.
B) Voters perceive Senate races as local contests,whereas they see House races as national elections.
C) PACs don't contribute money in Senate races.
D) The public hates the Senate more than they hate the House.
E) Voters perceive Senate races as less important than House races.