A ship helicopter landing deck on which fueling operations are conducted must have a fire protection system that is capable of discharging at 100 psi pressure a foam spray of at least（）.

A.generators
B.oil drums
C.the bridge controls
D.combustible metals

A.gravity when the extinguisher is turned upside down
B.pressure from a small CO₂ cartridge on the extinguisher
C.air pressure from the hand pump attached to the extinguisher
D.pressure from the reaction when water is mixed with the chemical

A.there are passengers berthed on board
B.navigating in excess of eight hours
C.the vessel has substantial wood in its construction
D.there is no automatic fire-detection system installed