Which action is recommended to improve visibility during night driving?

Answer: C — Ensure headlights are clean and properly aimed

Ensuring that headlights are clean and properly aimed is crucial for improving visibility during night driving. Headlights that are dirty or misaligned can severely limit your ability to see the road ahead and can create glare for other drivers. Clean headlights maximize their brightness and effectiveness, allowing you to see further and recognize potential hazards more easily. Properly aimed headlights illuminate the road adequately without blinding oncoming traffic, which enhances overall safety. While high beams can indeed improve visibility in certain conditions, they should not be used in all situations, especially when other vehicles are present. Turning off all lights is counterproductive and would leave the driver in complete darkness, and relying solely on street lights can limit vision in areas where they are sparse or absent. Thus, keeping headlights clean and well-aligned is the best strategy for safe night driving.