单选题A vessel being towed astern shall show at night（）.Athe lights required for a power-driven vessel underwayBonly the required masthead lightsCa sternlight onlyDsidelights and a sternlight
单选题
A vessel being towed astern shall show at night（）.
A
the lights required for a power-driven vessel underway
B
only the required masthead lights
C
a sternlight only
D
sidelights and a sternlight
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