Which of the following is the best definition of a security domain?

Which of the following is the best definition of a security domain?

A.
A domain that is managed by the same group using two different securitypolicies.

B.
A set of resources available to a subject in a secure manner.

C.
A domain that is managed by the same group using the same security policy.

D.
A set of resources available to a subject that are protected through a layeredapproach.

Explanation:
A security domain just builds upon the definition of domain by adding that theresources within this logical structure (domain) is working under the same securitypolicy and managed by the same group. A domain is a set of resources that areavailable to a subject.