W: Hilton Hotel. May I help you? M: Mr. John Thomas. Room 13, please. W: I'll put you through. Oh, sorry. Mr. Thomas isn't in at the moment. M: Can I leave a message? W: Certainly. M: Have him call Max Green at 6:00. It's important., Question: Who is the caller? (A) John Smith. (B) Max Thomas. (C) Max Green.
(C) Max Green.