What should drivers do when entering a roundabout?

Answer: B — Yield to traffic already in the roundabout

When entering a roundabout, drivers must yield to traffic that is already in the roundabout. This is crucial because vehicles within the roundabout have the right-of-way, which helps maintain a smooth flow of traffic and minimizes the potential for collisions. By yielding, drivers can safely merge into the roundabout when there is a gap in traffic, thus promoting a more efficient and safe driving environment. Accelerating to enter quickly could lead to dangerous situations, as it does not allow for proper assessment of incoming traffic. Stopping and waiting for a signal is not applicable in roundabouts, as they operate on a yield system rather than controlled signals. Proceeding without consideration of other vehicles disregards the traffic rules and can lead to accidents, making it essential for drivers to be aware of their surroundings. Thus, yielding to traffic in the roundabout embodies the key principle of safety and effective traffic management.