The project sponsor states that to ensure project success, the customer must be made aware of possible delays and issues. To achieves this, the customer wants their technical team to communicate directly with the project’s technical team.What document should the project manager review to ensure that this request is addressed? 项目发起人指出，为确保项目成功，必须让客户意识到可能存在的延误和问题。为此，客户希望他们的技术团队直接与项目的技术团队进行沟通。若要确保这项请求得以解决，项目经理应该审查哪一份文件？ ◑A.Communications management plan沟通管理计划 ◑B.Requirement traceability matrix需求跟踪矩阵 ◑C.Responsible, accountable, consult, and inform (RAXI) matrix执行、负责、咨询和知情（RACI）矩阵 ◑D.Project charter项目章程
