What is prohibited in a marked no-passing zone?

In a marked no-passing zone, passing another vehicle is strictly prohibited due to safety concerns. These zones are implemented in areas where visibility is limited or where it would be unsafe to overtake another vehicle, such as near curves, intersections, or other hazardous locations. The no-passing markings serve as clear indicators that attempting to pass could lead to dangerous collisions, as oncoming traffic may not be visible.

This regulation is in place to ensure the safety of all road users by preventing overtaking maneuvers that could have severe consequences. Other options mentioned involve specific distances from certain types of road signs or features, but the essence of a no-passing zone applies universally to any situation where the line indicates that passing is not allowed, making the correct emphasis on option C.