The order of priority of the following messages in the aeronautical mobile service is:

A、Meteorologicalmessage,directionfindingmessage,flightregularityMessage
B、Directionfindingmessage,distress message, urgencymessage
C、Distressmessage,flightsafetymessage,urgencymessage
D、Distressmessage,urgencymessage,directionfindingmessage