问题描述：
Can I help you?Yes.______.
选项：
A.I have a red hat.B.I want a red hat.C.I'd like a red hat.D.thanks
请说明原因,
选项：
A.I have a red hat.B.I want a red hat.C.I'd like a red hat.D.thanks
请说明原因,
问题解答：
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