What privilege level does a rootkit require to infect successfully on a Victim’s machine?

A rootkit is a collection of tools (programs) that enable administrator-level access to a computer.
This program hides itself deep into an operating system for malicious activity and is extremely
difficult to detect. The malicious software operates in a stealth fashion by hiding its files, processes
and registry keys and may be used to create a hidden directory or folder designed to keep out of
view from a user’s operating system and security software.

What privilege level does a rootkit require to infect successfully on a Victim’s machine?

A.
User level privileges

B.
Ring 3 Privileges

C.
System level privileges

D.
Kernel level privileges