What does a green traffic signal indicate?

Answer: B — Vehicles may proceed if the intersection is clear

A green traffic signal indicates that vehicles may proceed through the intersection, provided that it is clear and safe to do so. This means that drivers are given the right to move forward unless there are other obstructions or traffic control measures in place that would prevent them from doing so, such as a pedestrian crossing or another vehicle blocking their path. In the context of traffic signals, the green light signifies that the right of way is given to vehicles, and they should be alert for any unexpected situations, such as pedestrians or cyclists who may still be in the intersection. This understanding is crucial for traffic safety and the effective flow of vehicular traffic at intersections.