M: Is this your umbrella, Miss? W: Oh yes, it is. Thank you. I was looking for it just now. M: You look a bit familiar to me. I wonder if we have met somewhere before? W: Have we? M: May I ask where you live? W: Just two blocks away, in that tall building. M: That's it. I live there too. I am on the 8th floor. W: It's a small world. We live on the same floor. M: I'm Adam Smith. May I know your name? W: I'm glad to know you. Mr. Smith. I'm Lily Brown., Question: What is the probable relationship between them? (A) Neighbors. (B) Old friends (C) Old schoolmates.
(A) Neighbors.