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QusWhat does the term \"foreign key\" refer to in the relational model? QusWhat does the term \"foreign key\" refer to in the relational model?

A. A key attribute that uniquely identifies each tuple in a relation.
B. A key attribute that references another relation.
C. An attribute that is used for sorting data.
D. An attribute that is optional for each tuple in a relation.

Solution

B. A key attribute that references another relation.