What action should be taken if a Distress alert is received on the 12 MHz DSC frequency?

Correct Answer: Option B — Set the receiver to 12290.0 kHz J3E.

When a DSC distress alert is received on an HF frequency, the operator must immediately tune the radiotelephone to the corresponding voice distress frequency. For 12 MHz, the designated voice distress frequency is 12290.0 kHz (J3E), enabling the reception of vital information from the vessel in distress.