A vessel not using a traffic separation scheme shall avoid（）by as wide margin as practicable.

A.wide a place
B.wide a margin
C.wide enough
D.wide

A.I intend to meet you starboard to starboard
B.I do not intend to hold course and speed
C.I intend to overtake you on your port side
D.I intend to alter my course to port

A.all vessels must carry an after range light
B.vessels less than 50 meters in length need not carry an after range light
C.vessels stopped dead in the water should turn off their range lights
D.vessels over 20 meters in length must carry both range lights from sunset to sunrise