Which of the following fires requires a Class C fire extinguisher?

A Class C fire extinguisher is specifically designed to extinguish fires that involve electrical equipment. These types of fires occur when electrical wiring, appliances, or other equipment malfunction or overheat, leading to ignition. The extinguishing agents used in Class C extinguishers, such as carbon dioxide (CO2) or dry chemical powders, are effective at suppressing flames without conducting electricity, making them safe for use near live electrical circuits. This is crucial because using water or other conductive extinguishing agents on an electrical fire could create a risk of shock or electrocution. Therefore, the best choice for fires involving electrical equipment is a Class C fire extinguisher, which provides the safest and most effective means of suppression.