Which of the following is the rating for gasoline or oil fires?

Class C fires involve energized electrical equipment, not flammable liquids; the key hazard with Class C is the risk of electrocution from conductive extinguishing agents.

Class B fires involve flammable or combustible liquids including gasoline, petroleum oil, grease, and similar substances, as defined by NFPA 10 and adopted by OSHA standards. This classification dictates the appropriate suppression agent - typically CO2, dry chemical, or foam - because water-based agents can spread burning liquid and worsen the fire.

Class D fires involve combustible metals such as magnesium, titanium, or sodium, which require specialized dry powder agents incompatible with gasoline or oil fires.

Class A fires involve ordinary combustibles such as wood, paper, and cloth, which are solid organic materials rather than petroleum-based flammable liquids.