One Reason There May Be No Delegate Position for Members

One reason there may be no delegate position for members of Congress to take is that

A) many issues are of great concern to their constituents.
B) sometimes what constituents really want is not clear.
C) technology has made most congressional issues highly visible back home.
D) congressional issues rarely cut across a constituency in the same way.
E) many issues are of great concern to their constituents, and technology has made most congressional issues highly visible back home.