In a large mobile network deployment project, there is a delay risk due to insufficient staffing. The risk manager is considering executing a response plan that allows staff members to work overtime. However, this action may lead to excessive additional costs.

What should the risk manager do?

A- Document the concern over the potential excessive additional cost.

B- Ensure the project sponsor has the risk appetite for the residual risk created by allowing overtime.

C- Manage the potential excessive additional cost as a new risk.

D- Prepare a detailed response plan for the residual risk with a clear owner and timeline to ensure no impacts to the project.