单选题Foam extinguishes a fire by（）.Ashutting off the air supplyBcooling the fule to below ignition temperatureCdispersing the fuelDremoving the source of ignition
单选题
Foam extinguishes a fire by（）.
A
shutting off the air supply
B
cooling the fule to below ignition temperature
C
dispersing the fuel
D
removing the source of ignition
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