Why Do Members of Congress Who Represent the Interests of Localities

Why do members of Congress who represent the interests of localities to the federal government pass laws that create so many problems for the mayors and governors of these localities?

A) Because the structure of Congress is such that the interests of localities are rarely taken into account
B) Because the power of political parties to influence the votes of party members is so great
C) Because mayors and governors frequently resent federal interference in local affairs
D) Because most members of Congress regard their role as that of representing the national government to localities
E) Because members of Congress often represent different constituencies from the same localities