单选题When two vessels are in immediate danger of collision，the stand-on vessel must（）.Aabandon shipBassist in taking whatever action is necessary to avoid collisionChold course and speedDsound a distress signal
单选题
When two vessels are in immediate danger of collision，the stand-on vessel must（）.
A
abandon ship
B
assist in taking whatever action is necessary to avoid collision
C
hold course and speed
D
sound a distress signal
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