What type of brakes are inspected to ensure they function properly?

The correct choice indicates that all braking systems, including both disc and drum brakes, are inspected to ensure they function properly. This is crucial because a vehicle's braking system is a critical safety component, and both types of brakes may be present depending on the vehicle's design.

In many modern vehicles, disc brakes are commonly used on the front wheels, while rear wheels may have drum brakes. Therefore, inspecting only one type would not provide a complete assessment of the vehicle's braking capability. Proper function of all braking systems is necessary to ensure effective stopping power under various driving conditions. The inspection process makes sure that any potential issues, such as wear and tear, fluid leaks, or malfunctioning components, are identified and addressed promptly, thereby maintaining the safety and reliability of the vehicle on the road.

This comprehensive approach ensures that all aspects of the braking system operate effectively and in unison, reducing the risk of brake failure and enhancing overall vehicle safety.