Which of the following could lead to decreased visibility while driving?

Decreased visibility while driving can significantly impair your ability to see the road, other vehicles, and potential hazards. Worn windshield wipers are a critical factor that can lead to this issue. Over time, wiper blades can become cracked, bent, or hard, reducing their effectiveness in clearing rain, snow, or debris from the windshield. This means that even in light precipitation, visibility can be compromised, making it challenging to drive safely.

In contrast, clear weather conditions enhance visibility, and properly aligned mirrors ensure that a driver has the best possible view of the surroundings. Regular maintenance of headlights is also vital for maintaining visibility during darker times or in poor weather conditions. Thus, the presence of worn windshield wipers directly affects a driver's ability to maintain clear vision, making that option the correct choice.