All deviations from the baseline should be documented, including details of the investigation and outcome.
We do not enforce or encourage deviations. Presumably, we would already be aware of the deviation, so
"revealing" is not a reasonable answer.

Explanation
All the answers are true, but B is the most complete.

The most common and efficient manner of securing operating systems is through the use of baselines. A baseline is a standardized and understood set of base configurations and settings. When a new system is built or a new virtual machine is established, baselines will be applied to a new image to ensure the base configuration meets organizational policy and regulatory requirements.

Explanation
Explanation:
DNSSEC is an extension of the normal DNS protocol that enables a system to verify the integrity of a DNS query resolution by signing it from the authoritative source and verifying the signing chain. It is not used for securing data transmissions or exchanges. HTTPS is the most common method for securing web service and data calls within a cloud, and TLS is the current standard for encrypting HTTPS traffic. VPNs are widely used for securing data transmissions and service access.