A CO₂ extinguisher on a ship which has lost 10% of its charge must be（）.

A.maximum pressure allowed at that branch
B.name of the space or spaces which it serves
C.date of the last maintenance inspection
D.pressure needed to maintain an effective stream at that point

A.dry chemical or foam
B.foam or soda acid
C.carbon dioxide or foam
D.carbon dioxide or dry chemical

A.the hose could burst
B.the nozzle end will whip about causing damage or injury
C.water damage to vessel's cargo or structure
D.personnel might trip over the hose