What is the correct phraseology for a flight communicator to use when relaying an urgent message on behalf of another station?
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A
'ALL STATIONS, URGENT MESSAGE FOLLOWS'
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B
'PAN-PAN PAN-PAN PAN-PAN, ALL STATIONS' followed by the message
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C
'MAYDAY RELAY' followed by the original message
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D
'SECURITE SECURITE SECURITE' followed by the message