You detect the presence of a kernel-level rootkit embedded deeply within an operating system.

The CEH Malware and Rootkit Analysis module emphasizes that kernel-level rootkits compromise the most trusted components of the operating system. Once a kernel is compromised, no tool running on that system can be fully trusted.

CEH explicitly states that the only reliable remediation for kernel-mode rootkits is:

Full system wipe

Reinstallation from a known, trusted source

Restoration of verified clean data

Option C is correct and represents CEH best practice.

Option A may work for user-mode rootkits but is unreliable for kernel-level infections.

Option B is a research tactic, not remediation.

Option D is containment, not eradication.