Which of the Following Is a Disadvantage of Interviews

Multiple Choice

Which of the following is a disadvantage of interviews?

A) In most cases, response rates tend to be lower when interviews are used.
B) People are more likely to leave questions unanswered in an interview than on a written questionnaire.
C) People are more likely to agree to answer a mailed questionnaire than answer questions for a real person.
D) The interviewer could subtly bias the respondent's answers by inadvertently showing approval or disapproval of certain answers.