Which of the following entries can an administrator add to syslog.conf file to have all syslog messages generated by the administrator system go file to have all syslog messages generated by the admin

In `syslog.conf`, the format `facility.priority` specifies which messages to match, and `action` specifies where to send them. `*.*` matches all facilities and all priorities (i.e., all messages), and `/dev/tty12` directs these messages to the twelfth virtual console.

This syntax is incorrect for `syslog.conf`; `/var/log/messages` is a destination, not a selector, and the pipe symbol `|` is not used in this context to redirect to a console.

This entry lacks the required `facility.priority` selector, making it syntactically incomplete and therefore incorrect for syslog configuration.

This is not valid `syslog.conf` syntax; `syslog` is not a valid selector in this form, and `tty12` is incomplete as a destination.

`mail.*` would only direct messages from the mail facility to `/dev/tty12`, not 'all syslog messages' as requested by the question.