The Major Advantage Ousing Fixed-Alternative Questions in an Audience-Analysis Questionnaire

The major advantage ousing fixed-alternative questions in an audience-analysis questionnaire is that they

A) enhance the credibility of the questionnaire.
B) get below the surface of respondents' beliefs.
C) produce clear, unambiguous answers.
D) give respondents maximum leeway in answering.
E) require that respondents give truthful answers.