A project sponsor presents the high-level project requirements to the project manager. The project manager then requests an interview with a subject matter expert (SME) before developing the project management plan.Based on this information, from what document is the project sponsor reporting? 项目发起人向项目经理提出高层级别项目需求。然后项目经理在制定项目管理计划之前，要求与一名主题专家（SME）进行访谈。根据这些信息，项目发起人使用的文件是什么？ ◑A.Project statement of work (SOW)项目工作说明书（SOW） ◑B.Project strategic plan项目战略计划 ◑C.Project business case项目商业论证 ◑D.Project charter项目章程
