A、  B、  C、  B以why don’t开头的疑问句通常表示劝说。在听过对方说明之后，可以用(A)来应答。(C)用来回答“主要吃些什么”等问题。所以(B)最适合成为正确答案。

Who do you think will be promoted this year?
(A)The sale already ended.
(B)No, I got promoted last year.
(C)Sam might move up to manager.

Why don’t we have lunch at that new seafood restaurant?
(A)Great. How was it?
(B)That’s a good idea.
(C)Grilled dishes, mostly.