. Use of a supertype/subtype relationship is necessary when which of the following exists? Options: A . &nbspAn instance of a subtype participates in a relationship that is unique to that subtype. B . &nbspAn instance of a subtype participates in a relationship that is the same as the other subtypes. C . &nbspAttributes apply to all of the instances of an entity type. D . &nbspNo attributes apply to any of the instances of an entity type.

. Use of a supertype/subtype relationship is necessary when which of the fo

Question

. Use of a supertype/subtype relationship is necessary when which of the following exists?

Options:

A . An instance of a subtype participates in a relationship that is unique to that subtype.

B . An instance of a subtype participates in a relationship that is the same as the other subtypes.

C . Attributes apply to all of the instances of an entity type.

D . No attributes apply to any of the instances of an entity type.

Answer: Option A

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