单选题A white buoy with an open-faced orange diamond on it indicates（）.AdangerBvessels are excluded from the areaCthe buoy is a mooring buoyDoperating restrictions are in effect
单选题
A white buoy with an open-faced orange diamond on it indicates（）.
A
danger
B
vessels are excluded from the area
C
the buoy is a mooring buoy
D
operating restrictions are in effect
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