Which of the following lists all five classes of fire?

The classification of fires is based on the type of materials that are burning, and understanding these classes is crucial for effective fire prevention and response. The correct answer includes Class A, Class B, Class C, Class D, and Class K, which correspond to the types of fires that a firefighter or a fire extinguisher is designed to combat.

Class A fires involve ordinary combustible materials such as wood, paper, and cloth. Class B fires are related to flammable liquids and gases, such as gasoline or oil. Class C fires involve electrical equipment, and thus, require extinguishers that do not conduct electricity. Class D fires are those that involve combustible metals, such as magnesium or sodium, which have unique extinguishing requirements. Class K fires pertain specifically to cooking oils and greases, primarily found in commercial kitchens.

The listed classes in the correct answer encompass all the necessary types of fires that workers and first responders are trained to address, making this identification critical for safety measures in various environments.