What must you do before entering a street from an alley, building, driveway, or private road?

Answer: C — Stop

Before entering a street from an alley, building, driveway, or private road, the correct action is to stop. This requirement is crucial for ensuring safety, as it allows the driver to assess the situation before merging into the roadway. Stopping enables the driver to look for oncoming traffic and pedestrians, ensuring that the path is clear and safe to proceed. This precaution helps prevent accidents and promotes safer interactions with other road users. While yielding to traffic is important, the law specifically mandates a stop in these situations to allow a more thorough check of the surroundings before safely entering the roadway. Although signaling your intention to merge or enter a roadway is good practice, it does not replace the need to stop and check for safety. Speeding up could lead to dangerous situations, as it may prevent the driver from adequately observing traffic conditions. Thus, coming to a complete stop is the precise requirement in these scenarios to ensure clear visibility and safety.