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., Question: Who suggested the woman call the man? (A) Her friend. (B) Her friend's son. (C) Her son.
(A) Her friend.