Which of the following countermeasures must Larry implement to secure the user accounts on the web server?

Larry, a security professional in an organization, has noticed some abnormalities In the user accounts on a web server. To thwart evolving attacks, he decided to harden the security of the web server by adopting a countermeasures to secure the accounts on the web server.

Which of the following countermeasures must Larry implement to secure the user accounts on the web server?
A . Enable unused default user accounts created during the installation of an OS
B . Enable all non-interactive accounts that should exist but do not require interactive login
C . Limit the administrator or toot-level access to the minimum number of users
D . Retain all unused modules and application extensions

Answer: C