W: Hi, John. What are you doing here? M: I'm waiting for the bus. W: Where are you going? M: I'm going to the station to meet my sister. W: Oh, is she coming by herself? M: Yes, the train comes in about half past four, but it's twenty past four now. I have only ten minutes! W: How often does the bus run? M: Every ten minutes. I missed a No. 1 bus 15 minutes ago, and the next one hasn't come yet!, Question: How often does the No. 1 bus run? (A) Every 5 minutes. (B) Every 10 minutes. (C) Every 15 minutes.
(B) Every 10 minutes.