A fixed CO2 system on a ship with a capacity of over 300 lbs (136 kilograms) CO2 which protects spaces other than tanks must have（）. A:two or more releasing stations B:automatic release in event of a fire C:an audible alarm and time delay D:an audible and visible alarm

A fixed CO₂ system on a ship with a capacity of over 300 lbs (136 kilograms) CO₂ which protects spaces other than tanks must have（）.
A:two or more releasing stations
B:automatic release in event of a fire
C:an audible alarm and time delay
D:an audible and visible alarm

出自：海船船员证

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