W: Well, you know I had a good time tonight. M: I'm pleased to hear that. W: But I have to say goodbye right now. M: Why? It's not late. Can't you stay a little longer? W: No, I'm sorry, but I really must go. I don't know whether I can catch the last bus if I don't hurry now. M: When does the bus go? W: At ten o'clock. Oh dear! It's already a quarter past ten. M: Don't worry, Kate. Since you have missed the bus, it is unnecessary for you to hurry. I can drive you home. W: Thank you. You are so kind. But my mother will worry about me if I'm too late getting home. I must get home before 11:00. M: That's all right. Let's go now. But I hope to have a chance to see you again. W: Thank you, John., Question: Why did she have to leave at that time? (A) She didn't like to stay any longer with John. (B) She was afraid of walking alone at night. (C) She didn't want to make her mother worried.
(C) She didn't want to make her mother worried.