A fire hose with a nozzle attached must be connected to each hydrant except when exposed to heavy weather or when the（）.<br>A:fire hose might be damaged by cargo operations<br>B:vessel is in port<br>C:fire-main system is not charged<br>D:fire pumps are used for purposes other than supplying water to the fire main

A fire hose with a nozzle attached must be connected to each hydrant except when exposed to heavy weather or when the（）.
A:fire hose might be damaged by cargo operations
B:vessel is in port
C:fire-main system is not charged
D:fire pumps are used for purposes other than supplying water to the fire main

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