One advantage of open-ended questions in an interview is:

A) a significant amount of time can be devoted to each interviewee.
B) the interviewee is restricted to providing just a few answers.
C) previously unknown information can result.
D) they work well when the answers to the questions are well known.
E) they are not biased.

C
Explanation: C) Open-ended questions are usually used to probe for information when you cannot anticipate all possible responses. Finding unexpected or previously unknown information is a potential benefit of using open-ended question.
CL