Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）

A.red and black bands
B.green and black bands
C.red and white stripes
D.green and white bands

A.black
B.yellow
C.green
D.red

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