A twin-screw vessel can clear the inboard propeller and maneuver off a pier best by holding a（n） .

A twin-screw vessel can clear the inboard propeller and maneuver off a pier best by holding a（n） .
A.forward spring line and going slow ahead on the inboard engine
B.after spring line and going slow astern on the outboard engine
C.forward spring line and going slow ahead on both engines
D.forward spring line and going slow ahead on the outboard engine
正确答案：forward spring line and going slow ahead on the outboard engine