What is an instance?
A. It is a key that uniquely identifies a person, place, or thing.
B. It is a group of related information about an entity.
C. It is a record or row in a relation.
D. It is an occurrence of an entity class that can be identified by a primary key.
D. It is an occurrence of an entity class that can be identified by a primary key.
An instance is an occurrence of an entity class that can be uniquely described with a primary key.
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