Which options can be used to preempt an administrator logged into the firewall?

The option to log out is correct as it directly addresses the administrative session management on a firewall. When an administrator is logged in to the firewall, logging out terminates their session, effectively preempting their access. This action ensures that the system is secured and that no one can modify configurations or access sensitive information while the administrator is disengaged.

Other options may not offer the same level of certainty in terminating an administrator's access. Dropping into non-config mode may change the operational mode, but it doesn't necessarily log out the user or preempt their session completely. Resetting the connection could disrupt any ongoing activities but might not fully log the user out of their session, and forcefully terminating the session, while effective in terminating access, may potentially lead to loss of unsaved configuration changes, making it a less graceful approach.