Written change request should be required on?下列哪项要求书面的变更请求? A.
All projects, large and small所有项目,不论大小 B.
Large projects大项目 C.
Projects with a formal configuration management system in place实施正规配置管理系统的项目 D.
Projects for which the cost of a change control system can be justified 需要进行成本变更控制系统的项目