16. Relations are categorized into normal forms according to the referential integrity constraints that they have.

A. True
B. False

17. A relation is in Boyce-Codd Normal Form (BCNF) if every determinant is a composite key.

A. True
B. False

18. A functional dependency is always an equation.

A. True
B. False

19. A relation has cells that hold multi-value entries.

A. True
B. False

20. In a relation, the rows are sometimes called “fields.”

A. True
B. False