You’ve been assigned to take over managing a project that should be half complete according  to the schedule. After an extensive evaluation, you discover that the project is running far behind schedule, and that the project will probably take twice the time originally estimated by the previous project manager. However, the sponsor has been told that the project is on schedule. What is the BEST course of action?
A、Try to restructure the schedule to meet the project deadline .
B、Report your assessment to the sponsor.
C、Turn the project back to the previous project manager.
D、Move forward with the schedule as planned by the previous project manager and report at the first missed milestone.