在Visual FoxPro的查询设计器中,"筛选"选项卡对应的SQL短语是【 】。

A．WHERE

B．JOIN

C．SET

D．ORDER BY

Rebaselining may be required in cost control when （）.

A．CVs are severe, and a realistic measure of performance is needed

B．revised cost estimates are prepared and distributed to stakeholders

C．corrective action must be taken to bring expected future performance in line with the project plan

D．EAC shows that additional funds are needed to complete the project even if a scope change is not needed