单选题Coast Guard approved buoyant work vests（）.Amay be substituted for 10 percent of the required life preserversBshould be stowed adjacent to lifeboats and emergency stationsCmay be used by boat crews and line handlers during lifeboat drillsDshould be used when carrying out duties near a weather deck's edge
单选题
Coast Guard approved buoyant work vests（）.
A
may be substituted for 10 percent of the required life preservers
B
should be stowed adjacent to lifeboats and emergency stations
C
may be used by boat crews and line handlers during lifeboat drills
D
should be used when carrying out duties near a weather deck's edge
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