Explanation
Encryption at rest is a type of encryption methodology that would most likely be used to ensure encrypted data cannot be retrieved if a device is stolen. Encryption at rest is a process of encrypting stored data on a device such as a hard drive, SSD, USB flash drive, or mobile device. This way, if the device is lost or stolen, the data cannot be accessed without the encryption key or password. Encryption at rest can be implemented using software tools such as BitLocker on Windows or FileVault on Mac OS, or hardware features such as self-encrypting drives or Trusted Platform Module chips. End-to-end encryption is a type of encryption methodology that ensures encrypted data cannot be intercepted or modified by third parties during transmission over a network. Encryption in transit is a type of encryption methodology that protects encrypted data while it is moving from one location to another over a network. Public key encryption is a type of encryption algorithm that uses a pair of keys: a public key that can be shared with anyone and a private key that is kept secret by the owner. References:
https://www.howtogeek.com/196541/bitlocker-101-what-it-is-how-it-works-and-how-to-use-it/
https://www.howtogeek.com/443611/how-to-encrypt-your-macs-system-drive-removable-devices-and-individua
https://www.howtogeek.com/428483/what-is-end-to-end-encryption-and-why-does-it-matter/https://www.howto

Enabling a UEFI (Unified Extensible Firmware Interface) password prevents unauthorized users from making changes to the server's hardware configuration settings, such as boot order or device settings. This is crucial for protecting the integrity of the server at a remote location where physical security might be more difficult to enforce.
* UEFI password (Answer B): It provides security at the firmware level, preventing changes to low- level configurations unless the correct password is provided.
* Administrator account (Option A): While important for OS-level access, it doesn't prevent someone with physical access from altering hardware settings via UEFI/BIOS.
* Disabling WOL (Option C): Wake-on-LAN (WOL) allows a device to be powered on remotely.
Disabling it can help with security but does not prevent hardware configuration changes.
* Encryption at rest (Option D): Encryption protects data on the server but does not prevent hardware configuration access.
CompTIA Server+ Reference:This topic is covered under SK0-005 Objective 2.1: Install and configure server operating systems.

Explanation
Table Description automatically generated

Table Description automatically generated

The question states that there are several possible solutions so step #4 - Establish a theory has been done. Next is to test the theory changing one thing at a time and test for resolution.
Identify the problem.
Research.
Establish a theory of probable cause.
Test the theory.
Establish a plan of action.
Implement or escalate.
Verify functionality.
Document the solution.
https://www.techtarget.com/whatis/post/CompTIA-troubleshooting-steps-and-solving-common- computer-problems