搜题，就来89问答库（）is the Internet commerce designed for direct communications and commercial relationship between a firmand its end customer.
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（）is the Internet commerce designed for direct communications and commercial relationship between a firmand its end customer.
- A: A.B2C
- B: B.B2B
- C: C.B2A
- D: D.A2B
请帮忙给出正确答案和分析，谢谢！
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