What safety measure does a correctly adjusted rear view mirror provide?

A correctly adjusted rear view mirror is designed to maximize visibility of the road behind the vehicle. This is crucial for safe driving, as it allows the driver to see what is coming up directly behind them, including other vehicles and road conditions. Proper adjustment helps to cover as much of the rear view as possible, providing a clearer perspective that aids in making informed decisions while driving, such as when to change lanes or merge.

While an appropriately set rear view mirror can enhance awareness regarding adjacent vehicles, it does not completely eliminate blind spots, which are areas not visible in the mirrors. Additionally, while passenger comfort is important, the primary function of the rear view mirror is not related to comfort but rather to safety and awareness on the road. Thus, the correct answer highlights the importance of visibility while driving.