What does a properly set side view mirror allow the driver to see?

A properly set side view mirror is designed to enhance the driver's field of vision concerning the area that is adjacent to the vehicle, specifically the lane next to the vehicle. By properly adjusting the side view mirrors, drivers can minimize blind spots, allowing them to see neighboring lanes clearly. This is critical for safe lane changes and merging maneuvers, as it helps the driver to be aware of surrounding traffic that might otherwise be obscured from their direct line of sight.

In this context, the other choices do not align with the primary function of side view mirrors. The rear of the vehicle and the road directly behind are primarily monitored through the rearview mirror, while the blind spot is an area that side mirrors help to minimize but are not exclusively designed to view. Thus, the main benefit of correctly adjusting the side view mirror is to provide visibility of the lane immediately beside the driver's own lane.