Which of the following is an example of automatic control?

The FCC defines 'automatic control' as the use of devices and procedures for control of a station when it is transmitting so that compliance with the FCC rules is achieved without the control operator being present at a control point. A repeater is the classic example of an amateur station operating under automatic control, as it receives and retransmits signals without a human operator actively pressing a button for every transmission. Other options, such as using a computer to send CW automatically or to identify your station, still require a local or remote control operator to initiate the overall communication. While these are automated processes, the station itself is not functioning under FCC 'automatic control.'