What are some extinguishing agents for Class A fires?

Class A fires involve ordinary combustible materials such as wood, paper, and cloth. The correct extinguishing agents for these types of fires are water and foam, as they are effective in cooling and suppressing the combustion process. Water is particularly effective because it absorbs heat and reduces the temperature of the burning materials below their ignition point. Foam can also help by forming a blanket over the fuel, suffocating the fire and preventing it from getting enough oxygen to continue burning.

Dry chemical agents can be effective in a wide range of fire types, but in the context of Class A fires, the primary agents are water and foam. Options that include gasoline, which is a flammable substance, do not apply as they would exacerbate a fire rather than extinguish it. Additionally, while carbon dioxide is great for Class B and C fires, it is not ideal for removing heat from solid materials typically found in Class A fires. Thus, the combination of water and foam in option B showcases the most effective means to combat Class A fires.