I want to make a kite for my son..You can easily buy one in the market.A. Why not?

问题补充：

--- I want to make a kite for my son..

--- You can easily buy one in the market.

A. Why not?

B. Good idea!

C. Why bother?

D. No way!

答案：

A. Why not?

B. Good idea!

(答案→)C. Why bother?

D. No way!

解析：考查交际用语。句义：我想为我的儿子做个风筝。何苦呢，在市场上是很容易买到的。A. Why not? 为什么不呢（表同意） B. Good idea! 好主语（表同意） C. Why bother? 何苦呢（表不同意）D. No way!没门，根据句意，所以C正确。