When can you legally turn right on red?

Answer: B — After coming to a complete stop and ensuring it's safe

Turning right on red is permitted under specific conditions to ensure safety and compliance with traffic laws. The correct answer focuses on the requirement to first come to a complete stop at the red light before proceeding. This is crucial because it allows the driver to assess the situation at the intersection, checking for oncoming traffic, pedestrians, and any other potential hazards. By stopping completely, the driver ensures they are making a safe decision before executing the turn. In contrast, honking the horn does not play any role in determining the legality or safety of the turn. A green arrow signals that a turn is permitted, but it applies to a different scenario where the light is not red. Turning immediately without stopping disregards the need to assess safety, which is essential to prevent accidents. These factors underscore the importance of the requirement to stop first to maintain safety on the road.