The term super-delegate refers to

A. elected officials and party leaders who are not required to pledge themselves in advance to a presidential candidate.
B. delegates representing special-interest caucuses, such as those organized to represent blacks or homosexuals.
C. delegates at large who are chosen by a vote of the national party leadership.
D. delegates chosen by primary elections and grassroots caucuses.
E. delegates who received more than 80 percent of the vote necessary to achieve their status.

Answer: A