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单选题
An anchored vessel is servicing an aid to navigation and is restricted in her ability to maneuver. Which lights will she show? （）
A
Three lights in a vertical line，the highest and lowest red and the middle white，and anchor lights
B
Three lights in a vertical line，the highest and lowest red and the middle white，ONLY
C
Anchor lights ONLY
D
Anchor lights and sidelights ONLY
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