Which of the following must be functioning properly for a vehicle to successfully pass an inspection?

Passing a vehicle inspection in Maryland requires that certain critical safety and operational systems are functioning properly to ensure the vehicle is safe to operate. The choice regarding all lights, brakes, and steering systems is crucial because these components directly affect the vehicle's safety and drivability.

Lights are vital for visibility and signaling to other road users, which ensures safe operation, especially during nighttime or in adverse weather conditions. Brakes are essential for stopping the vehicle safely and preventing accidents. Similarly, the steering system must be responsive and in good condition to allow the driver to control the vehicle effectively.

While other components may contribute to the overall performance of the vehicle, the lights, brakes, and steering systems are non-negotiable for passing an inspection. If any of these systems are not functioning properly, the vehicle poses a risk both to the driver and to others on the road, therefore disqualifying it from passing the inspection. This understanding highlights the emphasis on safety critical components in the inspection process.