Containing subjects and objects and keeping them separate from one another for security reasons is known as:

A.
Hardware isolation

B.
Software isolation

C.
Binding

D.
Need-to-know

Explanation:
Isolation is a security measure used within trusted computer systems.
Hardware isolation ensures that the TCB is kept separate from untrusted areas of the
system, while software isolation guarantees that subjects and objects are kept away
from each other.