What additional item must you inspect for on a school bus?

A first aid kit, emergency exit, and reflective tape are essential items that must be inspected on a school bus. However, a fire extinguisher is an additional item that is also required to be present and inspected. The fire extinguisher must also be easily accessible, fully charged, and in proper working condition as indicated by a valid inspection tag. Therefore, option C is the only option that fits the criteria of an additional item to be inspected on a school bus.