--- Jack, I’d like to have your opinions about my written report.

--- _______. But I have one suggestion.

A．That’s a good idea

B．You are too modest

C．It looks fine to me

D．You should check it first

集体协商的不确定性包括（）。

A.谈判过程的不确定性

B.谈判结果的不确定性

C.谈判对象的不确定性

D.谈判未来的不确定性

E.谈判延续时间的不确定性