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:A
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.