The following PMP® exam sample question is taken from the Free PMP Exam Simulator at http://free.pm-exam-simulator.com - The answer is at the very bottom:

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The type, quantities and assumptions made in determining the resources, basis of estimate for each resource, and availability of resources for each activity or work package is identified in which of the following documents?
A.) Resource Breakdown Structure
B.) Responsibility Assignment Matrix
C.) Resource Calendars