听力原文：Mary: Mark. I don't want to listen to any more of your rubbish. I had enough of y

ou. Don't try to call me again. I'll pull out the wire.

Lucy: Hello, Mary. It's me, Lucy. Don't hang up.

Mary: Oh, is that you, Lucy？ Where did you spring out？ I thought you were in Canada.

Lucy: I returned yesterday. The first thing I wanted to do after I went back was to get in contact with my old friends. I had been trying to get you on the phone all morning, but your line kept busy. Just now, when I finally got through to you when the phone went dead on me. Did you slam it down？ What's going on between you and Mark？ A War？

Mary: More than a war. A divorce.

Lucy: You are joking, aren't you？ You used to love each other So much.

Mary: It's all over now. I don't want to talk about it any more on the phone.

Lucy: Are you free tomorrow？ Let's have a talk.

Mary: Fine. Would you please come over here at 8 o'clock at night？

Lucy: Ok. I'll call you tomorrow.

What is the relationship between the two speakers？

A．Sisters.

B．Friends.

C．Student and teacher.

D．Daughter and mother.