Questions 158~160 refer to the following instant messaging conversation.
Bruce: There's a new exhibition of sculpture on at the city gallery. If you don't have any plan for the coming weekend, I'm wondering whether you'd like to go with me.
Alice: Free time is at a premium for a working single mother.
Bruce: I completely understand that. But I think the exhibition would be a great way for you to take a break and enjoy some art.
Alice: It sounds tempting, but I really don't think I can make it this weekend.
Bruce: No problem at all. Would you like me to keep you updated about other interesting events happening in the city?
Alice: Thank you for the offer, but I think I will have to decline. I appreciate your thoughtfulness though. 
Bruce: I completely understand, Alice.
【題組】158.What is Alice's reason for declining Bruce's invitation?
(A) She cannot afford to attend the exhibition.
(B)She is not interested in sculpture exhibitions.
(C)She has a previous engagement on the same day.
(D)She prefers to spend her weekends with her family.