Which of the following indicates that a station is listening on a repeater and looking for a contact?

On FM repeaters, the accepted etiquette for casually letting others know you are available to talk is to simply state your call sign followed by the word 'monitoring' or 'listening'. This avoids tying up the repeater unnecessarily while effectively announcing your presence. While calling 'CQ' is the standard way to invite contacts on HF bands or during weak-signal VHF/UHF work, it is traditionally not used on FM repeaters. 'QSY' is a Q-signal meaning to change frequency, which is unrelated to announcing that you are simply listening for a contact.