W: United Development Company. May I help you? M: I'd like to speak to Mr. Hailer, please. W: Who shall I say is calling, please? M: This is Mr. Dewey from the IM Company. W: I'm sorry, Mr. Dewey, but Mr. Halley is not in at the moment. M: When will he come in, do you know? W: I suppose he won't be in until 12: 00. M: May I leave a message? W: Certainly. M: Please ask him to give me a call as soon as he returns. He has my number. W: Very well, Mr. Dewey, I'll do that. M: Thank you. Bye-bye., Question: How does the conversation take place? (A) By the radio. (B) Between two friends. (C) On the phone.
(B) Between two friends.