搜题，就来89问答库（）is software about the relation between the customer the customer and the supplier in marketing
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（）is software about the relation between the customer the customer and the supplier in marketing
- A: Customer Relationship Management (CRM)
- B: Customer service
- C: Sales planning
- D: Distribution channel
请帮忙给出正确答案和分析，谢谢！
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