What does a "No Entry" sign mean?

Answer: C — No vehicles are allowed to enter this path.

A "No Entry" sign is specifically designed to indicate that no vehicles are permitted to enter the path or roadway where the sign is placed. This is crucial for maintaining safety and order on the roads, as it typically applies to one-way streets or restricted areas where traffic should flow in a specific direction or where entry is prohibited altogether. Understanding this helps drivers recognize that proceeding beyond this sign could lead to dangerous situations, such as head-on collisions with oncoming traffic or entering restricted zones. The sign serves as a clear directive for drivers to respect traffic regulations and ensures the smooth operation of road systems by preventing unauthorized access to certain areas.