Which of the following correctly describe DAC?

A.
It is the most secure method.

B.
It is of the B2 class.

C.
It can extend beyond limiting which subjects can gain what type of access to which objects.

D.
It is of the B1 class.

Explanation:
With DAC, administrators can limit access to certain times of day or days of the week.
Typically, the period during which access would be permitted is 9 a.m. to 5 p.m. Monday
through Friday. Such a limitation is designed to ensure that access takes place only
when supervisory personnel are present, to discourage unauthorized use of data.
Further, subjects’ rights to access might be suspended when they are on vacation or
leave of absence. When subjects leave an organization altogether, their rights must be terminated
rather than merely suspended.