When approaching a stop sign, what must a driver do?

Answer: B — Come to a complete stop

When approaching a stop sign, a driver is required to come to a complete stop. This action is crucial for ensuring safety at intersections, as it allows the driver to assess the traffic situation before proceeding. Coming to a complete stop means that the vehicle’s wheels are not rotating and that the vehicle is fully halted at the designated stopping point, which is typically marked by the stop sign or a line on the road. This full stop provides the opportunity to check for any oncoming vehicles, pedestrians, or cyclists, and ensures that the driver is making informed decisions when it's time to proceed. By fully stopping, drivers not only comply with traffic laws but also help prevent accidents that could arise from assuming the right of way or moving without adequate observation. This mandatory halt is a key component of safe driving practices at controlled intersections.