M: Prof.Jordan has been very busy this term.As far as I know.he works until mid-night every day.
W: I wouldn’t have troubled him so much if I had known he was so busy.
Q: What does the woman imply（）

A. She has trouble getting along with the professor.
B. She knows that the professor has run into trouble.
C. She knows that the professor has been very busy this term.
D. She regrets having taken up much of the professor’s time.