During the planning phase a project manager is notified that a key resource must take an extended leave. The project manager needs to ensure that the project schedule is not negatively impacte .What should the project manager do next?
在规划阶段，项目经理被告知一名关键人员必须延长休假时间，项目经理需要确保项目进度计划不受负面影响。
项目经理下一步应该怎么做？
A.Identify the situation as a project risk and add it to the risk register
将该情况识别为一个项目风险，并将其添加到风险登记册中
B.Assign backup resources to the projects为项目分配备用资源
C.Notifies the projects sponsor通知项目发起人
D.Update the resources management plan更新资源管理计划