单选题A vessel engaged in trawling will show identification lights of（）.Aa red light over a white lightBa white light over a red lightCa green light over a white lightDtwo red lights in a vertical line
单选题
A vessel engaged in trawling will show identification lights of（）.
A
a red light over a white light
B
a white light over a red light
C
a green light over a white light
D
two red lights in a vertical line
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