M: Hello, this is Jonason speaking. W: Hello, Jonason, I am Kasy. I am sorry to tell you that I may not attend your birthday party this weekend. M: Oh, what's up? W: Nothing much.., but... M: What's happened then? W: I have an important exam at that time. M: If so, I think we can hold the party ahead of time. What do you think about it? W: Yeah, It is a good idea. I can't agree more. M: Great and I wish you success. W: Thank you, happy birthday to you., Question: Why can't Kasy attend Jonason's birthday party? (A) She has a quiz at that time. (B) She has to do her homework. (C) She has an important exam at that time.
(C) She has an important exam at that time.