Which Example Best Demonstrates a Legislator Acting as a Trustee

Which example best demonstrates a legislator acting as a trustee of his or her constituency?

A) A legislator considers public opinion,refining it with information and careful thought.
B) A legislator does whatever is best for his or her reelection.
C) A legislator follows the public opinion of his or her constituency.
D) A legislator may follow his or her conscience unless public opinion is clear.