What does a red traffic light mean?

Answer: B — Stop and wait until the light turns green

A red traffic light signals that drivers must come to a complete stop at the intersection. This rule is crucial for maintaining safety on the roads, as it prevents collisions by controlling the flow of traffic at intersections. After stopping, drivers must remain stopped until the light changes to green, which allows them to proceed safely. Ignoring a red light can lead to serious accidents and violations of traffic laws. The understanding of this signal is fundamental for all drivers to ensure everyone's safety on the road.