Answer:
The correct answer is C. Issues directly concerning their constituencies.
Step-by-step explanation:
The representatives usually have two different positions regarding the way in which they represent the population of their constituencies: either as delegates, exercising the literal will of their voters (thus, they decide according to what most of them manifest), or as trustees, that is, as representatives with independent political criteria (where they decide according to their criteria, insofar as it is understood that voters trust the representative's criteria to represent them in Congress). Thus, in matters that directly influence their constituencies, representatives tend to act as delegates, manifesting as the majority of their voters do.