At an intersection with a yield sign, you must _____.

Answer: B — Slow down

At an intersection with a yield sign, you must slow down. This is because yield signs indicate that you must give the right-of-way to any oncoming traffic or pedestrians. Stopping at a yield sign is not required unless it is necessary to avoid an accident. Changing lanes or increasing speed is not necessary and may even be dangerous if there is oncoming traffic, which is why those options are incorrect.