A database View operation implements the principle of:

A.
Entity integrity.

B.
Separation of duties.

C.
Referential integrity.

D.
Least privilege.

Explanation:
The correct answer is “Least privilege”. Least privilege, in the database context,
requires that subjects be granted the most restricted set of access privileges
to the data in the database that are consistent with the performance
of their tasks.
Separation of duties, assigns parts of security-sensitive tasks to several individuals.
Entity integrity requires that each row in the relation table must have a
non-NULL attribute. Relational integrity, answer d, refers to the
requirement that for any foreign key attribute, the referenced relation
must have the same value for its primary key.