The following PMP® exam sample question is taken from the Free PMP Exam Simulator (The answer is at the very bottom):

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Regarding WBS Quality Principle 1, there are two sub-principles that pertain to satisfying requirements for the use of a WBS. Which of the following are these two sub-principles?

A) Hierarchical and Lucid.
B) Well Formatted and Scope Relevant
C) Core Characteristics and Use-Related Characteristics
D) None of the above.

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Hint: PMI acknowledges WBS Quality Principle 1.