The three basic elements necessary for any fire are （）.<br>A:heat, gas, and flames<br>B:fuel, heat, and oxygen<br>C:heat, nitrogen, and fuel<br>D:fuel oil, nitrogen, and oxygen

The three basic elements necessary for any fire are （）.
A:heat, gas, and flames
B:fuel, heat, and oxygen
C:heat, nitrogen, and fuel
D:fuel oil, nitrogen, and oxygen

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