What action should you take at a flashing red light?

Answer: B — Treat it as a stop sign and come to a complete stop

When approaching a flashing red light, the correct action is to treat it as a stop sign and come to a complete stop. This traffic signal indicates that vehicles must yield to all other traffic and pedestrians before proceeding through the intersection. Stopping allows you to assess the situation for any oncoming vehicles or pedestrians ensuring that it is safe to continue. Recognizing a flashing red light as a stop signal helps maintain orderly traffic flow and enhances safety at intersections, similar to how a stop sign functions. The need to come to a complete stop ensures that drivers are cautious and aware of their surroundings, which reduces the likelihood of accidents. In contrast to the correct choice, slowing down and proceeding with caution does not provide the same level of safety as a complete stop; it could lead to misunderstandings by other drivers about your intentions. Yielding to oncoming traffic would not apply in this scenario since all drivers facing the flashing red must first stop, making yielding unnecessary until they have determined a safe path. Keeping driving unless there’s traffic disregards the requirement to stop and evaluate the intersection, which is crucial when encountering any warning signal.