Speaker A: Thank you very much for helping me with my history. Speaker B: ______A.Sure thi

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Speaker A: Thank you very much for helping me with my history. Speaker B: ______

A.Sure thing. Don"t thank me!

B.You"re welcome. I"m glad I can be of help.

C.It was a piece of cake! Don"t mention it!

D.Oh, this is what I should do.

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗