A、Colleagues. B、Friends. C、Brother and sister. D、Husband and wife. BWhat’s the relationship between the man and the woman?

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!