The correct answer is D.
Rebaselining (choice A) hides performance problems rather than managing issues as they occur. Choice C may need to be done, but it is not proactive. Choice B is not a bad choice, but it cannot be done without knowing why there was a delay. Imagine that a resource’s skills are not what you have been led to believe, and that resource is working on another activity later in the project. If you crash or fast track activities involving that resource, the problem could recur. Identifying the root causes of the delay (choice D) will help determine what to do about them.
Pass PMP in the First Attempt : PMP Strategy
Revise Schedule Management Concepts: Project Schedule Management
Quiz:
20 Questions Challenge
50 Questions Challenge