Select The Proper Word For The Blank

"A vessel using traffic separation scheme shall join or leave from the side (          )."

• A.

  Only in area near the termination of traffic separation schemes

• B.

  By as wide a margin as practicable

• C.

  At as small an angle to the general direction of traffic flow as practicable

• D.

  As nearly as practicable at right angle to the general direction of traffic flow