The sign used to caution persons approaching the gangway of a tank barge during cargo transfer reads（）.<br>A:Warning，Keep Off，Stay Clear<br>B:Danger，Do Not Board<br>C:Warning，No Smoking，No Open Lights，No Visitors<br>D:Dangerous Cargo Being Transferred

The sign used to caution persons approaching the gangway of a tank barge during cargo transfer reads（）.
A:Warning，Keep Off，Stay Clear
B:Danger，Do Not Board
C:Warning，No Smoking，No Open Lights，No Visitors
D:Dangerous Cargo Being Transferred

出自：海船船员证

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