The correct answer is D) leave it on continuously. When you activate your emergency position-indicating radio beacon (EPIRB), you should leave it on continuously until help arrives. EPIRBs are designed to transmit a distress signal on an international emergency frequency, alerting search and rescue authorities to your location. Turning it off or turning it on and off at intervals would interrupt the distress signal and delay the arrival of rescue. The regulations require the EPIRB to remain active to ensure the search and rescue response is as quick and effective as possible. The other options are incorrect because they would interfere with the EPIRB's continuous distress signal transmission, which is the essential function of this emergency device.