Which of these items must be operational for a vehicle to pass inspection?

For a vehicle to pass inspection, it is essential that all necessary light indicators are operational. This includes not only the brake lights and front headlights but also other critical lights such as turn signals, taillights, and any dashboard indicator lights that signal important vehicle functions. Ensuring that all light indicators work properly is crucial for the safety and visibility of the vehicle on the road, as well as for compliance with legal standards. Each of these components plays a vital role in communicating the driver's intentions to other road users, thus reducing the risk of accidents.

While some other options mention specific components, they do not encompass the full range of lights that must be functional, which includes all necessary indicators across the vehicle to ensure it is safe and roadworthy.