What action must be taken when approaching a stop sign?

Answer: B — Stop completely before the intersection

When approaching a stop sign, it is essential to stop completely before the intersection. This requirement is crucial for ensuring safety at intersections where right-of-way rules apply. A complete stop allows drivers to thoroughly assess the situation in all directions—left, right, and straight—before proceeding, ensuring that it's safe to enter the intersection. This action helps prevent collisions with oncoming traffic, cyclists, or pedestrians who may also be crossing. By stopping fully, you are able to give due consideration to any vehicles or individuals that may have the right of way, thus promoting safer driving behavior. The other options suggest actions that do not align with traffic laws and safety practices, such as rolling through the stop without halting, speeding up to cross intersections, or only checking in one direction. Such behaviors can lead to accidents and are not permissible under Indiana traffic regulations.