Final answer:
The windshield must be clean and free from any obstructions to satisfy legal requirements and ensure safe driving visibility.
Step-by-step explanation:
By law, for safe driving, the windshield of a vehicle must meet certain visibility requirements. The correct statement is: The windshield must be clean and free from any obstruction. This means, to comply with legal standards and promote safe driving, the windshield should not have any cracks, chips or excessive tinting that might impede the driver's view. It is neither required by law to have your windshield tinted nor to have a crack or chip. Moreover, the windshield should definitely not be opaque as this would completely block the driver's view, which is illegal and extremely unsafe.