How does the inspector verify the adequacy of a vehicle’s windshield?

The inspector verifies the adequacy of a vehicle’s windshield primarily by ensuring that it is free of significant cracks or obstructions that impede visibility. A clear and unobstructed view is essential for safe driving, as it allows the driver to see the road, other vehicles, pedestrians, and various traffic signals without hindrance. Any significant cracks or obstructions can reduce visibility and potentially lead to accidents.

The other choices focus on aspects that, while important, do not directly address the primary function of ensuring that the windshield allows for safe visual access. Enhancing a vehicle's aerodynamics or meeting legal tint standards pertains to performance and aesthetics rather than immediate safety in terms of visibility. Moreover, inspections for scratches alone would not be comprehensive, as larger cracks or obstructions must also be considered to ensure driver safety and adherence to regulations.