[单选题]( )S1:MAYDAY,MAYDAY,MAYDAY. This is MV EuphoriA.I am disabled and adrift.I need help. Over. S2:MV Euphoria,this is MV Blue Whale.Your MAYDAY received.What is your position? Over. Q:What happened to the vessel? A.flooding B.disabled and adrift C.in danger of capsizing D.grounding