When mapping a supertype/subtype relationship which of the following is true?

[A].	The supertype primary key is assigned to each subtype.
[B].	The subtype primary key is assigned to each supertype.
[C].	There is no link between the supertype/subtype entities.
[D].	There is no primary key/foreign key relationship between a supertype/subtype.

Answer: Option A

Explanation:

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