You are assigned as the project manager to a project which is executed for a customer under FP contract．Your customer informed you this morning that they insist on certain“refinements”of the project scope．You agree that the requested actions make really sense to the project，but believe that they constitute a major change increasing the project scope．What should you do next ？（）

A．Accept the request of the customeDiligently document the additional costs and working hours spent by yourself and the team on the implementation of the change and invoice these to the customer at appropriate rate
B．Perform earned value analysis to assess the current status of the project and get all the numbers you need to communicate the case to the change control board which then will have to make the best decision regarding the customer reques
C．Check the contract，the project charter，the scope statement and other documents related to the project and the contracAssess the impacts of the scope changThen discuss the situation with the project sponsor and the change control boar
D．Talk to the project sales department and find a joint solution with them how to best reject the request considering the commercial and strategic value of the customer to the organization you are working fo