The correct answer is D) working.
The stage of the interview is "working."
Different authors propose different structures of an interview. But in a general structure, the moment when the interviewer says "So, let me put it together. You want to work on your relationship with your daughter. . . and your ideal way of doing it is. . . " is when it is working the interview once the interviewer has enough facts to place this kind of question. The interviewer has listened to the right amount of answers to collect some data and poses a question like that.
The other options of the question were A) initiating the session. B) gathering data. C) mutual goal setting. E) terminating and generalizing.