A、Disconnect his telephone. B、Blow a whistle into the receiver. C、Keep a record of incoming annoyance calls. D、Report his proble

M: Have you found an apartment yet?
W: No. We need such a large amount of space that all the apartments we’ve seen are too expensive.
Q: Why are the people having trouble finding an apartment?

M: I’ve been having annoyance calls for two weeks. When I answer the phone, the other party hangs up without saying anything. I’ve tried everything including blowing a whistle into the receiver.
W: Beginning today, we want you to keep a record of the time each call occurs. From this chart, we can get information to help us trace the calls. If necessary, the telephone company can contact the police.
Q: What does the woman suggest that the man do?