Some chloronated flourocarbon refrigerants may decompose into a toxic irritating gas if it is （）.<br>A:stored at temperatures below 60 degrees Fahrenheit<br>B:charged into a system having copper fittings<br>C:allowed to mix with compressor oil<br>D:exposed to an open flame or hot surface

Some chloronated flourocarbon refrigerants may decompose into a toxic irritating gas if it is （）.
A:stored at temperatures below 60 degrees Fahrenheit
B:charged into a system having copper fittings
C:allowed to mix with compressor oil
D:exposed to an open flame or hot surface

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