A、She has a quiz at that time. B、She has to do her homework. C、She has an important exam at that time. D、She has an important me

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.
Q6. Why can’t Kasy attend Jonason’s birthday party?
7.What will Jonason do to solve this problem?