题目内容
（请给出正确答案）
[主观题]
听力原文：M: I am pleased we've reached an agreement on the amount of materials. We just ha
ve a very tight budget. Thank you for your understanding.
W: I' m glad you are happy. But please help us next time. We are not making any profit this time.
M: I know it' s not giving you a margin. I promise that we will order at least 3,000 units every year!
W: That's a deal then.
What are they doing？
A．Support
B．Praise
C．Complain
D．Negotiate
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