Economist Mancur Olson Suggested That Interest Groups Tend to Have

Economist Mancur Olson suggested that interest groups tend to have a harder time getting around the free-rider problem as they grow larger because:

A) leadership loses its tight control as membership increases.
B) people outside of the group come to see them as a corrupting influence.
C) their efforts have diminishing returns as the group becomes entrenched in the political mainstream.
D) individuals do not have much incentive to become active members and supporters of a group that is already more or less working on their behalf.