Configuration management is______.

A．used to ensure that the description of the project product is correct and complete

B．the creation of the work breakdown structure

C．the set of procedures developed to assure that project design criteria are met

D．a mechanism to track budget and schedule variances

税收收入电予缴库业务的凭证包括（）。

A.电子缴款书

B.电子缴税付款凭证

C.电子缴库入库清单

D.电子退库书