单选题A vessel enagaged in fishing，and at anchor，shall show（）.Aan anchor lightBsidelights and a sternlightCthree lights in a vertical line，the highest and lowest being red，and the middle being whiteDNone of the above
单选题
A vessel enagaged in fishing，and at anchor，shall show（）.
A
an anchor light
B
sidelights and a sternlight
C
three lights in a vertical line，the highest and lowest being red，and the middle being white
D
None of the above
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