In mandatory access control, the authorization of a subject to have access

to an object is dependent upon:

A.
Roles.

B.
Labels.

C.
Tasks.

D.
Identity.

Explanation:
The correct answer is Labels. Mandatory access controls use labels to
determine whether subjects can have access to objects, depending on
the subjects’ clearances. Answer roles is applied in non-discretionary
access control as is tasks. Identity, is used in discretionary
access control.