Transcript text: Which statement best expresses how party identification helps researchers understand and interpret the opinions given by survey respondents?
A. Party identification does not help researchers; most pollsters try to avoid questions about party identification because it clouds results.
B. Party identification is somewhat helpful to researchers; it doesn't help researchers understand much beyond whether or not a respondent will vote in the next election.
C. Party identification is just about the only piece of information a researcher needs; once party identification is established, every other opinion on other topics is a given.
D. Party identification is very useful to researchers; party identification is typically stable, and it can color how respondents might view other issues.