For the below question, I thought the correct answer is B but the correct answer is D - critical chain method. Any some explain me.

You are into Schedule development phase of your project. You have been asked to emphasize on resources required to do project tasks, more than task orders or schedules. With this in mind which of the following tools will you use?

Response:

A. Critical Path
B. Resource Leveling
C. Resource Calendars
D. Critical Chain Method