What must you do when you see a yield sign?

Answer: C — Slow down and prepare to stop if necessary

When you see a yield sign, the appropriate action is to slow down and prepare to stop if necessary. A yield sign indicates that you should give the right-of-way to other vehicles and pedestrians that may be approaching the intersection. This means that as you approach the yield sign, you should reduce your speed to ensure that you can assess the situation safely. If there are no vehicles or pedestrians in the intersection, you may proceed without stopping. However, being prepared to stop if necessary is crucial for ensuring safety, as you need to be ready to yield to oncoming traffic or crossing pedestrians. Recognizing the need to adjust your speed allows you to navigate the intersection effectively while following the rules of the road.