Question: An entity cluster is A . a set of one or more entity types and associated relationships grouped into a single abstract entity type. B

An entity cluster is
A. a set of one or more entity types and associated relationships grouped into a single abstract entity type.
B. a formal method for specifying attributes of related entities.
C. a useful way to present data for a small and fairly simple organization.
D. a way of developing more granular views of the data model.

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