Which of the following is a characteristic of a good interview?

a. Make the interview as concise as possible.
b. The interviewer should announce his or her bias at the outset, because the interviewee will cooperate better when the interviewee knows the type of information the interviewer is seeking.
c. Friendly interviewees appear very helpful, but they may have hidden motives and may provide bad information.
d. It is important to schedule interviews ahead of time, especially if you are planning to interview a potentially hostile interviewee.