How should drivers behave in a roundabout?

Answer: A — Yield to vehicles already in the roundabout

In a roundabout, drivers must yield to vehicles already circulating within it. This is crucial for maintaining the flow of traffic and minimizing the risk of collisions. When approaching a roundabout, understanding that vehicles inside have the right of way helps ensure a smooth transition into the roundabout without disrupting the traffic flow. By yielding, drivers can safely gauge the movement of vehicles already in the roundabout and find an appropriate gap to enter without causing accidents or traffic jams. The other options suggest behaviors that could lead to confusion or potential hazards. Always stopping before entering the roundabout can create unnecessary delays and disrupt the flow of traffic, while entering as quickly as possible might lead to dangerous situations if there isn’t enough space. Using hand signals might be unnecessary in roundabouts, as the circular nature of the traffic flow makes intentions more predictable. Therefore, yielding to vehicles already in the roundabout is the appropriate behavior to ensure safety and efficiency.