What should be intact regarding the vehicle's lights?

The correct answer emphasizes the importance of having no cracks or condensation inside the light housing, which is crucial for ensuring the lights function effectively and are visible in various driving conditions. Intact light housings prevent moisture accumulation that can lead to electrical malfunctions and can compromise the clarity and brightness of the lights. Cracks can also allow dirt and debris to enter, which can obstruct visibility and reduce safety.

The other choices do not hold the same significance in a pre-trip inspection context. For instance, while matching colors among vehicles may be relevant for aesthetic purposes, it does not impact the functionality or safety of the individual vehicle being inspected. Similarly, having new and untested bulbs is not a standard requirement; it is more important for the bulbs to be functional rather than new. Lastly, turning off the lights during an inspection does not allow the inspector to see if the lights are operational and correctly functioning.