What feature is mandated on all school buses to enhance student safety?

Answer: C — Stop signs that extend

The feature that is mandated on all school buses to enhance student safety is the stop signs that extend. These stop signs play a critical role in protecting students as they enter or exit the bus. When the bus stops to pick up or drop off children, the stop sign extends from the side of the bus, alerting other drivers that they must stop. This is crucial because children are often in close proximity to moving traffic when boarding or disembarking, and the extended stop sign helps to create a safe zone around the bus. The presence of these stop signs is part of a broader set of safety regulations designed to minimize risks during school transportation. Their visibility and function are specifically aimed at eliminating the chance of accidents while children are getting on or off the bus. While other features like rear view cameras, flashing hazard lights, and emergency exit doors also contribute to the overall safety of a school bus, the extended stop sign is particularly pivotal in directly managing the traffic around the bus during these critical moments.