( )是确保建设项目负责人承担相应责任的基本条件，也是建设项目管理成功的前提。

A．一定的职责

B．一定的素质

C．一定的权利

D．一定的能力

A code of accounts ______ .

A．is any numbering system used to uniquely identify each component of the work breakdown structure

B．includes work packages, used to track phase completion

C．is an organizational scheme to keep track of contracts

D．charts elements of the WBS against the timeline