单项选择题

[听力原文]6-8
W: Can you recognize me, David
M: Why, are you Margaret
W: Sure, I am. We haven’t seen each other for over twenty years.
M: You haven’t changed so much.
W: You haven’t either.
M: Remember the days when we were together We used to go out for a walk every evening after supper.
W: And my mother used to say that we are more like brother and sister than friends.
M: Those good old days!

What’s the relationship between the man and the woman()

A.Colleagues.
B.Friends.
C.Brother and sister.
D.Husband and wife.