What must you do when you see a red traffic light?

Answer: A — Stop and wait for the green light

When you encounter a red traffic light, the appropriate response is to stop and wait for the green light. This rule is fundamental to traffic safety and ensures that all drivers and pedestrians follow predictable patterns. Stopping at a red light prevents potential collisions that could occur if vehicles were to proceed through an intersection without yielding to oncoming traffic. It is a clear signal that indicates you must come to a complete stop at the marked stop line or before entering the intersection. While slowing down before stopping might seem reasonable, it is essential to stop completely for safety. Proceeding carefully or yielding to other vehicles is not suitable under a red light, as those actions do not comply with the established traffic regulations. Ensuring that you stop at a red light is vital for maintaining order on the roads and protecting everyone, including yourself and other road users.