单项选择题

Conversation 2
Questions 8 to 10 are based on the conversation you’ve just heard.
[听力原文] 8-10
W: Hi, my name is Christa and I have a friend Mary, whose son is taking guitar lessons from you, and she suggested I call you.
M: OK. Will the lessons be for yourself or your son
W: I want to learn. My son is only three.
M: Fine. Have you had any musical experience before
W: Well, I studied the piano for about three months but that was 6 years ago.
M: That’s good. So we needn’t start right from the beginning again.
W: When can I take lessons and how much do they cost
M: Well, that depends on you. We have a small group that meets on Monday and Wednesday evenings for two hours, that costs $4 an hour. Then on Tuesdays and Thursdays I give private lessons which cost $8 an hour.
W: I’m afraid that I can’t make it on Mondays but I can come on Wednesdays.

Who suggested the woman call the man()

A.Her friend.
B.Her friend’s son.
C.Her son.
D.Her friend and her son.