Drivers must maintain windshield wipers in good operating condition because:

Maintaining windshield wipers in good operating condition is essential because they play a crucial role in ensuring clear visibility during adverse weather conditions, such as rain and snow. When the windshield is obscured by precipitation, it can significantly impair a driver's ability to see the road, other vehicles, and potential hazards. Efficient windshield wipers clear the moisture from the glass, allowing the driver to maintain a better line of sight and react appropriately to changing road conditions and obstacles. This is vital for safety and helps in preventing accidents. While other features like fuel efficiency, night visibility, and glare reduction are important for general driving, the primary function of windshield wipers directly ties to maintaining visibility during poor weather, making this the most relevant choice.