Regardless of an interest group's size or resources, it can be considered powerful if

A. ?it has strong and effective leadership.
B. ?it successfully turns itself into a political party.
C. ?its members are motivated, engaged, and politically active.
D. ?it has strong and effective leadership and it successfully turns itself into a political party.
E. ?it has strong and effective leadership and its members are motivated, engaged, and politically active.

Answer: E