Because the Overriding Consideration for Most Lawmakers Is to Get

Because the overriding consideration for most lawmakers is to get reelected, the interests of which source are most important in leading them to a decision on how to vote?

A) Campaign contributors are vital to a legislator so care must be taken not to alienate them.
B) They must carefully balance the interests of a variety of groups to ensure continued support.
C) The political party to which the legislator is a member of can make or break a legislator's career.
D) Legislators represent the people who put their faith in a legislator's personal convictions.
E) A legislator's senior colleagues are the biggest influence on how they will vote.