You are getting project performance information as your project is being executed. Based on the performance information, forecasts are updated and reissued. Some factors that could change as forecasts are updated include （）.

A．estimate to complete

B．estimate at completion

C．estimate to complete and estimate at completion

D．none of the above

（）成了谋职的新天地。

A、国有单位

B、集体单位

C、非公有制单位

D、私人单位