Carmen Is Interviewing a Candidate for the Vacant HR Manager

Carmen is interviewing a candidate for the vacant HR manager position in her department. During the interview, what would be a good

A) "What would be your first move if one of the employees asks for a compassionate leave on the day of a major client meeting"; because it helps the interviewer assess the candidate's reaction to a situation under pressure.
B) "How long have you been in this business?"; because it helps the interviewer elicit a short and quick response from the candidate.
C) "What changes would you make to our current department?"; it helps the interviewer have a longer conversation with the candidate.
D) "If this job were to require you to travel once a month, would you be willing to do so?"; it helps the interviewer be objective during the interview.