Which of the following can potentially cause a vehicle fire?

The possibility of a vehicle fire can stem from several different scenarios, making the option that encompasses all of them the most accurate choice.

Spilled fuel after a collision poses a significant risk as gasoline is highly flammable. If a spark or ignition source is present, even a small amount of spilled fuel can lead to a fire. This is especially critical in commercial vehicle environments, such as school buses, where flammable substances are more prevalent due to the presence of fuel systems.

Under-inflated tires can create excessive heat through increased friction, especially if they come into contact with one another. This excessive heat can ignite flammable materials, including those found on or inside the vehicle, thereby contributing to the risk of a fire.

Driver smoking near fuel is a well-known hazard. Since cigarettes can easily ignite fuel vapors, which may linger near refueling areas or if fuel is spilled, this behavior significantly increases the potential for a fire.

Therefore, since all these situations represent distinct and legitimate risks for causing a vehicle fire, identifying all of them as potential causes confirms the understanding of fire hazards in vehicle operation and maintenance in a comprehensive manner.