There was a heated discussion about customer service at the meeting until the manager came up with a great idea.()

There was a heated discussion about customer service at the meeting until the manager came up with a great idea.()

A. 经理提出的关于客户服务的好主意，在会议上引起了大家的热烈讨论。

B. 经理到会之前，会议还在对那个客户提出的合理建议进行热烈的争论。

C. 会议就客服问题进行了热烈讨论，直到经理提出一个绝妙主意才停止。

D. 会议一直在热烈讨论客服问题，直到结束时经理才想出了一个好主意。

请帮忙给出正确答案和分析，谢谢！