Which of the following would be the BEST method to increase the security on the Linux server?

A cybersecurity department purchased o new PAM solution. The team is planning to randomize the service account credentials of the Windows server first.

Which of the following would be the BEST method to increase the security on the Linux server?
A . Randomize the shared credentials
B . Use only guest accounts to connect.
C . Use SSH keys and remove generic passwords
D . Remove all user accounts.

Answer: C