For a binary one-to-one relationship between two entities A and B, the relationship is represented by:
A) adding the primary key of A as a foreign key of B.
B) adding the primary key of C as a foreign key of D.
C) combining the two entities into one relation.
D) creating a third relation to represent the relationship between the two entities.
E) deleting the primary keys.
A
Explanation: A) Although there are several acceptable ways to do a one-to-one relationship, only adding the primary key of A as a foreign key of B is correct among the answer choices.
CL
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