What action should you take when you see a red light at an intersection?

Answer: B — Come to a complete stop

When you see a red light at an intersection, the correct action to take is to come to a complete stop. A red light indicates that vehicles must stop and not proceed until the light changes to green. This rule is critical for ensuring safety at intersections, as it prevents collisions among vehicles and protects pedestrians crossing the road. Stopping at a red light gives you the opportunity to observe your surroundings, assess any traffic conditions, and ensure that it is safe before continuing your journey. This adherence to traffic signals is a key element of road safety and helps maintain an orderly flow of traffic. The other actions, such as speeding up to get through the light, yielding to oncoming traffic, or preparing to turn left, do not align with the required behavior in the presence of a red light and pose significant safety risks.