Which of the following contributes to a driver’s visual awareness?

The correct choice emphasizes the importance of keeping windows clean and unobstructed, which directly enhances a driver’s visual awareness. Clean and clear windows allow for optimal visibility of the road and surrounding environments, enabling a driver to better detect obstacles, other vehicles, and potential hazards. Any obstructions or dirt on the windows can significantly impair vision, leading to delays in reaction time and an increased risk of accidents.

Maintaining a safe following distance, while important for safe driving, primarily affects reaction times and stopping distance rather than visual awareness itself. Similarly, reading road signs is crucial for understanding traffic regulations and navigational instructions but does not inherently improve overall visual awareness of the driving environment. Relying solely on mirrors can also limit a driver's field of vision, making it necessary to use direct sight whenever possible. Therefore, ensuring that windows are clean and free from obstructions is vital for maintaining comprehensive visual awareness while driving.