What are the primary components of a school bus braking system?

The primary components of a school bus braking system are critical for ensuring effective and safe stopping power. The inclusion of brake pads, rotors, and hydraulic lines in the correct answer accurately represents the essential elements of a conventional braking system.

Brake pads are vital components that make contact with the rotors to create the friction needed to slow down or stop the bus. Rotors, typically made of metal, play a crucial role by providing a surface for the brake pads to clamp onto, transferring the braking force. Hydraulic lines are also essential as they transfer brake fluid from the master cylinder to the brake calipers, allowing for the effective operation of the braking system.

Understanding the function of these components helps highlight their importance in maintaining overall vehicle safety. While other options mention various elements related to braking or vehicle systems, they do not encompass the primary components that directly affect the braking capability of a school bus.