What should you do if you encounter a roundabout?

Answer: B — Yield to the traffic already in the roundabout

When approaching a roundabout, it is essential to yield to traffic that is already in the roundabout. This is because vehicles circulating within the roundabout have the right of way. By yielding, you ensure a safe flow of traffic, preventing collisions and allowing for smooth transitions into the roundabout. Yielding also helps maintain the momentum of vehicles already engaged in the roundabout, reducing the likelihood of sudden stops or slowdowns that could disrupt traffic. This practice is crucial for proper navigation through the roundabout, as it promotes a cooperative driving environment where each driver respects the rights and movements of others. In contrast, stopping to wait for all vehicles to clear is unnecessary and can lead to congestion as traffic builds up behind you. Entering without yielding can cause dangerous situations and accidents, as it disregards the established right-of-way rules. Similarly, accelerating to merge is inappropriate because it increases the risk of collisions rather than facilitating a safe entry into the roundabout. Understanding and following these rules is key to mastering roundabout navigation effectively.