What is an access control model?

A.
A formal description of access control ID specification.

B.
A formal description of security policy.

C.
A formal description of a sensibility label.

D.
None of the choices.

Explanation:
What is an access control model? It is a formal description of a security policy. What
is a security policy? A security policy captures the security requirements of an
enterprise or describes the steps that have to be taken to achieve security. Security
models are used in security evaluation, sometimes as proofs of security.