What does a no U-turn sign indicate?

Answer: B — U-turns are prohibited

A no U-turn sign clearly indicates that making a U-turn in that area is prohibited. This is generally put in place for safety reasons, often in locations where turning around could create hazards, such as on busy roads, near intersections with limited visibility, or in areas where pedestrian traffic is high. Respecting this sign helps prevent accidents and ensures smoother traffic flow. It's crucial for drivers to comply with these regulations to maintain safety on the road.