The look-out must be able（）full attention to the（）of a proper look-out．

A.take all her way off
B.take her way all off
C.take her way off
D.take off her all way

A.you can stop within your visibility range
B.you can take proper and effective action to avoid collision
C.you are traveling slower than surrounding vessels
D.no wake comes from your vessel

A.Is restricted in her ability to maneuver
B.Has sounded the danger signal
C.Is not taking appropriate action
D.Has not changed course since risk of collision was determined