VPD provides authorization at the level of specific tuples, or rows, of a relation, and is therefore said to be a _____________ mechanism.

VPD provides authorization at the level of specific tuples, or rows, o

1.	VPD provides authorization at the level of specific tuples, or rows, of a relation, and is therefore said to be a _____________ mechanism.
A.	Row-level authorization
B.	Column-level authentication
C.	Row-type authentication
D.	Authorization security
Answer» B. Column-level authentication