Explanation: An EPIRB with its control switch in the "OFF" position should not be flashing or transmitting. The strobe light flashing indicates that the unit is active and very likely transmitting a distress signal, despite the switch position. This is a critical malfunction. Assuming the unit is transmitting (even falsely) is the responsible course of action. False distress signals trigger immediate search and rescue responses, consuming vital resources. To prevent an unnecessary SAR operation, you must follow established procedures to properly cancel the false distress alert. This typically involves immediately contacting the relevant authority (e.g., USCG or national SAR coordinator) to report the false activation and provide the EPIRB's unique identification. * **A) Place the control switch in the "OFF” position:** This is incorrect because the question states the switch is *already* in the "OFF" position. * **B) No action is needed – the strobe light indicates the automatic monthly self test is in progress:** This is incorrect. A self-test would not occur with the unit's switch "OFF," nor would it typically be indicated by continuous flashing suggesting full activation. A flashing strobe while "OFF" indicates a malfunction. * **C) Wait for the USCG or NOAA to confirm that the unit is actually transmitting:** This is incorrect and irresponsible. Waiting delays the cancellation process, potentially leading to the unnecessary deployment of rescue assets. Immediate action is required to mitigate a false alert.