A project aimed at replacing critical applications will affect multiple internal and external services. During the planning process, project stakeholders offering these services failed to commit to the fulfillment of agreed activities. How should the project manager improve the engagement of the project stakeholders?
一个更换关键应用程序的项目将影响多个内部和外部服务。在规划过程中，拥有这些服务的项目相关方未能承诺履行约定活动。项目经理应该如何改进项目相关方的参与程度？
◑A.By negotiation and communication.用谈判和沟通
◑B.Report this to the Steering Committee.将这种情况上报给指导委员会
◑C.Prepare a probability and impact matrix.准备一份概率和影响矩阵
◑D.Record this in the issue log.将这种情况记录在问题日志中