Which quality management and control tool is useful in visualizing parent-to-child relationships in any decomposition hierarchy that uses a systematic set of rules that define a nesting relationship?

Which quality management and control tool is useful in visualizing parent-to-child relationships in any decomposition hierarchy that uses a systematic set of rules that define a nesting relationship?
A .  Interrelationship digraphs
B .  Tree diagram
C .  Affinity diagram
D .  Network diagram

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Answer: B