Which of the following is a customary way to indicate a station is listening on a repeater and looking for a contact?

When operating on a repeater, calling "CQ" is generally considered unnecessary and poor etiquette. Because repeaters usually cover a fixed local area and stations are often quietly monitoring the frequency, a long, drawn-out calling sequence is not needed. Instead, the customary way to initiate a contact is to simply state your call sign followed by the word "listening" or "monitoring." This brief transmission is entirely sufficient to alert anyone listening that you are available to chat. The other options are incorrect for repeater use. QSY is a procedural signal that means to change frequencies, and calling using the repeater's call sign instead of your own violates FCC station identification rules.