单选题下列哪项要求书面的变更通知单（Written change orders）？（）A不论大小的所有项目B大项目C具有正式配置管理系统的项目D变更控制系统的成本可以调整的项目
单选题
下列哪项要求书面的变更通知单（Written change orders）？（）
A
不论大小的所有项目
B
大项目
C
具有正式配置管理系统的项目
D
变更控制系统的成本可以调整的项目
参考解析
解析：
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