W: Why don't you sit down? Now, there are several questions I must ask you if you don't mind. M: Not at all. Go ahead. W: What is the purpose of your visit to the States? M: I'm going to attend a conference on air pollution. W: When and where is this conference being held? M: It's being held in the first two weeks of February at the University of Stanford in California. W: Who will pay your expenses? M: The University of Stanford. Here is the official letter of invitation. W: I see. Fine. When do you want to go? M: I'd like to leave in mid-January if my passport is ready by then. W: That shouldn't be difficult. Why don't you phone me about January 10th? I should be able to give you an answer then. M: Thank you., Question: How long will the conference last? (A) One month. (B) Two weeks. (C) Seven days.
(B) Two weeks.