Which of the Following Is Considered a Benefit of Minor

Which of the following is considered a benefit of minor parties in the democratic process?

A) Their most effective role is to act as spoiler.
B) They tend to move individuals into either the Democratic or Republican parties.
C) They may have some effect on the main parties by changing the focus of policy discussions.
D) In some cases, they may circumvent the election of a potentially more popular candidate.