At a stop sign, what should a driver do if there are no vehicles present?

Answer: B — Stop, then proceed safely.

At a stop sign, the law requires drivers to come to a complete stop, regardless of whether there are vehicles present or not. This is essential for ensuring safety and compliance with traffic regulations. Stopping allows the driver to fully observe the intersection for any potential hazards, such as pedestrians or cyclists who might not be immediately visible. After making a complete stop, the driver can assess the situation and then safely proceed when it is clear to do so. This practice contributes to overall road safety and helps develop responsible driving habits, making it the correct choice in this scenario.