Why is it crucial for a school bus to have properly functioning mirrors?

Answer: B — To ensure the driver's visibility and safety while driving

Having properly functioning mirrors on a school bus is essential primarily to ensure the driver's visibility and safety while driving. The mirrors are critical tools that help the driver monitor the entire area around the bus, including blind spots, the backsides of the bus, and nearby pedestrians or cyclists. Given that school buses frequently make stops to pick up and drop off children, the ability to see and assess the surrounding environment is vital to prevent accidents and ensure the safe operation of the vehicle. Proper mirror adjustment and functionality contribute significantly to the driver's ability to react appropriately to any potential hazards while navigating through traffic or during routine stops. This is particularly important in school zones or residential areas where children may be present. Hence, maintaining the mirrors in good condition is not only a matter of safety but also a regulatory requirement in many jurisdictions to ensure that school buses operate safely and effectively.