Lower the ladder two steps（） ,please !A、tooB、moreC、littleD、few

A. 1 is the default precedence.

B. A lower number is preferred.

C. A higher number is preferred.

D. 100 is the default precedence.

材料：

At around 0545 hrs the Cutter PILOT-5 approached the Vessel．The cutter&39;s skipper drew the pilot&39;s attention to the fact that the pilot ladder was hanging free in the air and did not stick to the ship&39;s side surface and he suggested to transfer the ladder more to the midship position．The answer to his suggestion was that it was not him who had to climb the ladder．At that time the vessel weighed the anchor and started her engine．

Half the propeller was emerged from the water．The pilot called the vessel and ordered to stop her engine． Because the gangway was already extended，the skipper decided to approach the vessel from the bow．

The 2nd Officer was standing at the upper platform. of the gangway while the 3rd Officer was standing at the lower platform. in order to secure the pilot．The ladder was correctly lit and the Officers had a radio contact with the bridge．At around 0600 hrs the pilot，assisted by the pilot boat engineer，stepped on the pilot ladder and started to climb up．PILOT-5 turned backwards and its crew was observing the Pilot embarkation．

When the Pilot climbed up to the lower platform. he asked for help．The 3rd Officer extended his hand to him．At that moment the pilots&39; hands slipped off the pilot ladder lines and the pilot fell from a height of 7 metres into the water．

问题：

The vessel rigged _______．

A.pilot ladder only

B.gangway only

C.pilot ladder in combination with the gangway

D.neither pilot ladder nor the gangway

The passage indicates _______．A.the vessel has deep draughts

B.the vessel has large freeboard even fully loaded

C.the vessel is in ballast

D.the vessel is fully loaded

The pilot ________．A.did not know that the pilot ladder was improperly rigged

B.knew that the pilot ladder was not rigged properly but still climbed on it

C.did not believe that the pilot ladder was not rigged properly

D.did not see the unstable movement of the vessel when he climbed on the pilot ladder

Who is to blame for the accident according to the passage ___________．A.the pilot

B.the vessel

C.the pilot boat

D.the officers onboard the vessel

请帮忙给出每个问题的正确答案和分析，谢谢！

The ladder shall ______．

A.be secured in a position so that it rests firmly against the ship's side from which the discharge operations are carried out

B.have at least two replacement steps which are secured in position by a method different from that used in the original construction

C.have battens made of hardwood，or other material of equivalent properties，in one piece and not less than

D.have steps made of softwood，or other material of equivalent properties，made in one piece free of knots，having an efficient slip surface

Mean high water is the average height of ______.

A.the higher high waters

B.the lower high waters

C.the lower of the two daily tides

D.all high waters