A risk was realized on site for a project. This risk was recorded in the risk register. The investigation team concludes that the risk could have been prevented if proper risk management had been performed.What should the project manager have done to avoid this? 一个风险在项目现场变成现实,这个风险记录在风险登记册中,调查团队得出结论,如果进行了适当的风险管理,本可以预防这个风险。若要避免这个问题,项目经理应该事先做什么? ◑A.Reviewed lessons learned from previous projects审查过往项目的经验教训 ◑B.Updated the existing risk management plan更新现有风险管理计划 ◑C.Assigned risk owners to the items on the risk register为风险登记册上的事项指定风险责任人 ◑D.Created risk mitigation action for the identified risks为已识别到的风险减轻行动