For a software development project, most of functions have been agreed upon by the customer. This customer is also a stakeholder, and is responsible for reviewing the requirement specification. After the project starts, the customer’s boss, who was unidentified as a stakeholder, become involved in the project and demands changes to the approved requirements. This causes significant rework and extends the timeline. What should the project manager do?
对于一个软件开发项目，大部分功能都已经通过客户同意。该客户也是一位相关方，负责审查需求规格书。项目开始后，该客户的老板（之前未被识别为一位相关方）参与项目要求对批准的需求进行变更。这导致项目发生严重返工并延长时间表。项目经理应该怎么做？
◑A.Add this to the risk register.将其添加进风险登记册
◑B.Submit a change to the change control board (CCB).向变更控制委员会（CCB）提交一项变更。
◑C.Revise the project management plan to include the updates.修订项目管理计划，以包含这些更新。
◑D.Plan a buffer for time and resources to compensate for unexpected change requests.规划时间和资源的缓冲区，以补偿预期之外的变更请求。