In the last two months of the implementation stage, a software development project has been completed two weeks ahead of schedule. A subject matter expert(SME) gathered some requirements, these requirements are defined to help software end users. Developers expected to demand it, it will also require to verify its availability. Because the develope is ahead of the schedule, what should the project manager do ?
A、Notify the industry experts that the new features are not included in the scope, cannot modify the scope due to non-critical requirements.
B、 Prepare a change request and hand it to the change control board  to be considered and approved.
C、 Add the request into the future-improved list, because the change at the end of the project may be at risk.
D、 Demand developing stuffs to execute the change request, because the scope change is expected to take a week, but do not make changes to request.