Third parties do best when:
a) they concentrate on winning national office, not state and local elections.
b) there is a major scandal.
c) they have a dynamic candidate.
d) trust in the major parties is low.
e) major parties are more similar in their issue positions.

Third parties do best when they have a dynamic candidate. The best answer for the question given above is option C. Despite their lack of success in the polls, third parties can affect American politics in a number of ways: Introduce new ideas, Put issues on the agenda, Spoil the election, and Keep the major parties honest.