What is the purpose of a stop sign?

Answer: B — To require all vehicles to come to a complete stop

The purpose of a stop sign is to require all vehicles to come to a complete stop. This regulatory sign is placed at intersections where the flow of traffic must yield to ensure safety and smooth movement. When a driver approaches a stop sign, they must stop their vehicle completely before proceeding, allowing them to assess the traffic conditions and make safer decisions. This is crucial in preventing accidents, especially in areas where visibility may be limited or where cross traffic might not be easily seen. The regulation of coming to a complete stop ensures that vehicles have adequate time to check for pedestrians, cyclists, and other vehicles, creating a safer environment for everyone on the road.