How is a vehicle's braking system typically inspected?

The correct approach to inspecting a vehicle's braking system involves checking for functionality, wear, and adjustment during regular maintenance. This comprehensive method ensures that all components of the braking system are examined not just visually, but through operational testing and specific measurements as needed.

During regular maintenance, mechanics will look at various aspects of the braking system, including brake pads, rotors, and fluid levels. They check for wear and tear that could affect performance, ensuring that these components meet safety standards. Furthermore, adjustments may be needed for brakes to function optimally, such as ensuring the correct tension on brake cables or proper alignment of pads and rotors.

While visual inspections and test drives can provide some information about the braking system’s condition, they do not cover the scope of checks necessary to guarantee safety and functionality. Observing brake lights can verify if they work when pressed but does not assess the overall effectiveness of the braking system. Hence, option B represents a thorough and effective approach to ensuring the braking system's integrity and safety.