What should be inspected on the bus before driving?

Answer: B — Rider signaling devices

Before driving a bus, it is essential to conduct a thorough inspection to ensure safety and compliance with regulations. One of the critical components to check is the rider signaling devices. These devices, such as stop request buttons or pull cords, enable passengers to communicate their intention to stop at the next designated location. Ensuring these devices are functioning correctly is vital for maintaining passenger safety and comfort, as they should be easily accessible and operational for the riders. Additionally, while other components like emergency exits, windshield wipers, and tire pressure are important aspects of a bus inspection, the rider signaling devices specifically relate directly to passenger interaction and safety during transit, making it a priority to inspect prior to driving.