单项选择题
A.the ship type B.the port's organization C.the cargo's nature D.the docker's ability
A.at B.to C.for D.in
A.The fioot/tons needed to trim the vessel by 1 inch B.The foot/tons needed to trim the vessel by 1 foot C.The moments needed to trim the vessel by 1 centimeter D.The amount of vessel will trim when loading 100 tons 100 feet from the tipping center