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單項選擇題

Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? ()

A.A safe-water buoy will display red and white vertical stripes of reflective material
B.All reflective material is white because it is the most visible at night
C.A special-purpose mark will display either red or green reflective material to agree with its shape
D.A preferred-channel buoy displays either red or green reflective material to agree with the top band of color

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