单项选择题

W: Has Bob moved yet
M: Yes, he moved out last weekend.
W: I wonder if he’ s paying more for rent now.
M: I don’ t have the faintest idea.

What does the man mean()

A. He refuses to answer the woman’s question.
B. He is pretty sure that Bob is paying more for rent.
C. He doesn’ t know where Bob moved to.
D. He doesn’t know about the rent of Bob’s new house.