M: Good morning, Mr. Carson, pleaseW: I’m afraid Mr. Carson is at a very, important meeting at the moment and cannot be disturbed. May I know who’s callingM: Yes, this is Mr. Prince. I would like to talk to Mr. Carson today, if possible.W: Well, I’m afraid the meeting isn’t planned to finish until one o’clock and then he has a lunch appointment. If he has time, I can ask him to ring you before he leaves.M: Yes, I’d be grateful if you would.W: Not at all. Mr. Prince. Could I take your telephone number and then I’ll ask Mr. Carson to ring you as soon as he’s free.M: Yes, it’s Hong Kong-68261427 extension 4036.W: Hong Kong-68261427 extension 4036. Right. If Mr. Carson can’t ring you this morning, I’ll ask him to ring you as soon as he returns from lunch.M: Thank you. What is Mr. Carson doing when Mr. Prince calls him()

A. He is having a talk with his customer.
B. He is having a meeting right now.
C. He is out instead of having a meeting now.