The Primary Way to Control Potential Bias Due to Interviewer's

Multiple Choice

The primary way to control potential bias due to interviewer's attitudes, opinions, perceptions, etc., is through:

A) matching the backgrounds of the interviewer and interviewee.
B) training the interviewer.
C) recruiting interviewers with similar socioeconomic backgrounds.
D) conducting the survey using a rigid set of procedures which the interviewers must follow.
E) requiring the interviewer to complete the questionnaire so that it can be determined if there is a pattern between the interviewer's answers and the answers he or she secures when administering the questionnaire.