What does a white dashed line on the road indicate?

Answer: C — Allows passing when safe to do so

A white dashed line on the road serves as a guide for drivers, indicating that lane changes are permitted under safe conditions. This line means that vehicles are allowed to cross it to pass other vehicles or change lanes, as long as it can be done safely and without disrupting the flow of traffic. This feature is crucial for maintaining a smooth driving experience, allowing for necessary maneuvers while still adhering to safety standards. The presence of this line signals to drivers that they should check for safety before proceeding with a pass.