What Aspect of Jimmy Carter's 1976 Campaign Illustrated Its Insurgent

What aspect of Jimmy Carter's 1976 campaign illustrated its insurgent nature?

A) his focus on his status as a Washington outsider, which would ensure a clean break from the Watergate scandal
B) his promise to end the divisive partisan squabbles that had plagued the previous administration
C) his pledge not to use negative campaign advertising against his opponent
D) his focus on the negative economic policies of the incumbent