The project manager has just received a change from the customer that does not affect the project schedule and is easy to complete. What should the project manager do FIRST?
A． Make the change happen as soon as possible.
B． Contact the project sponsor for permission.
C． Go to the change control board.
D． Evaluate the impacts on other project constraints.
项目经理刚从客户那里收到一个变更要求， 它不会影响项目的时间而且容易完成。 项目经理应该首先做什么？