What is the minimum distance from an approaching vehicle within which a driver must pass to the left safely?

The correct choice indicates that a driver must pass to the left safely when there is an approaching vehicle within a minimum distance of 200 feet. This regulation is crucial for ensuring the safety of both the driver passing and the oncoming vehicle. A distance of 200 feet provides ample space for the passing maneuver, allowing the driver enough time to complete the pass without endangering themselves or the oncoming traffic.

Passing at a closer distance could significantly increase the risk of a collision, particularly if the oncoming vehicle is traveling at a high speed or if visibility is limited. The 200-foot rule helps maintain a safety buffer, accounting for variables such as vehicle speed, road conditions, and reaction times. This regulation is designed to facilitate safe driving practices and reduce the likelihood of accidents in situations where passing is necessary.