How Does the Smaller and More Elite Nature of the Senate

How does the smaller and more elite nature of the Senate affect how senators vote?

A) They are under greater peer pressure to vote as dictated by party leaders.
B) Greater stature gives them greater freedom to vote according to their personal beliefs.
C) Lesser stature means that their views are largely dictated by their constituents' views.
D) They are little influenced by either constituents or colleagues.
E) They can vote as they want, and then influence their constituents to agree.