Filler cargo refers to（）.

A.contain flammable fumes
B.protect firefighters from flames
C.prevent flames from entering tanks
D.keep flames and sparks from getting out of an engine's exhanst system

A.increase the ttrim
B.increase ship stability
C.cause a serious list
D.decrease the heeling moment

A.also called decks
B.vertical transverse plates connecting the vertical keel with the margin plates
C.large beams fitted in various parts of the vessel for additional strength
D.found in passenger and berthing spaces only