What is the correct action when approaching a roundabout?

Answer: B — Yield to vehicles on your right

When approaching a roundabout, it’s essential to yield to vehicles on your right. This is a crucial rule because vehicles already on the roundabout have the right of way, and yielding helps maintain the flow of traffic and reduces the risk of collisions. By yielding, you ensure that you are aware of oncoming traffic and can safely enter the roundabout when there's a gap, allowing for a smooth transition into the circular pathway. This understanding of right-of-way at roundabouts is fundamental for safe driving and contributes to overall road safety.