A.call for help and keep the individual in sight
B.run to the radio room to send an emergency message
C.immediately jump in the water to assist the individual
D.go to the bridge for the

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