Which of the following statements best describes the role of mandatory access controls? A. They protect other services after a security breach in an account. B. They protect a system from access by a...

Which of the following statements best describes the role of mandatory access controls?

A. They protect other services after a security breach in an account.

B. They protect a system from access by a malicious user through firewalls.

C. They disable cleartext services such as Telnet.

D. They provide specific requirements for access to critical services.