Party Identification Among Voters Is One Way of Gauging the Strength

Party identification among voters is one way of gauging the strength of a party. Another cited by the text is the

A) number of parties that appear on the ballot in a national election.
B) use of a party label or symbol on ballots in municipal elections.
C) strength of the organization that recruits and campaigns for candidates.
D) protection offered to individual parties by the U.S. Constitution.
E) amount of attention given to parties by the media.