Which of the following rated systems of the Orange book has mandatory protection of the TCB?

A.
A-rated

B.
B-rated

C.
D-rated

D.
C-rated

Explanation:
A B-rated system of the orange book has mandatory protection of the trusted
computing base (TCB).
Trusted computing base (TCB) refers to hardware, software, controls, and processes that cause a
computer system or network to be devoid of malicious software or hardware. Maintaining the
trusted computing base (TCB) is essential for security policy to be implemented successfully.