Why is it necessary to warn engine room personnel before activating the fixed CO2 system?（） A:To make them aware there is a fire B:To let them know they should leave the engine room C:To prevent possible injury from frostbite D:To make them aware that ventilation will automatically stop

Why is it necessary to warn engine room personnel before activating the fixed CO₂ system?（）
A:To make them aware there is a fire
B:To let them know they should leave the engine room
C:To prevent possible injury from frostbite
D:To make them aware that ventilation will automatically stop

出自：海船船员证

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