The following statements about subprojects are correct, except that:

下列关于子项目的说法都是正确的，除了：

A.The division of subprojects is convenient to contract part of the work to external enterprises

A.子项目的划分便于把部分工作发包给外部企业

B.A stage in the project life cycle can be considered as a subproject

B.项目生命周期中的一个阶段可以被作为一个子项目

C.Jobs that require the same human resources (such as water and electricity installation workers) can be used as subprojects

C.需要使用同样人力资源(如水电安装工人)的工作，可以被作为子项目

D.The division of subprojects is conducive to reducing the workload and cost of management

D.划分子项目，有利于减少管理工作量，降低管理成本