Which of the Following Statements About Political Parties Is LEAST

Which of the following statements about political parties is LEAST accurate?

A) They exist primarily in order to get candidates elected, not to shape policy.
B) They allow voters to assign collective responsibility for government actions.
C) Unlike many political institutions, they can be held accountable in elections.
D) They help voters identify candidates who share their views.
E) Their role and function is clearly delineated in the Constitution.