As a software project ends, the project is ahead of schedule and under budget. The key team member advises the project manager that it increases small budget to the project, you can add a new function to the software to benefit the customer. What should the project manager do next ?
A、Maintain the original scope.
B、Verify with the customer if these new features is needed
C、Implement the new functions, and improve customer satisfaction.
D、 Perform a risk assessment and if there is no risk exposure, perform the new functions.