Which of the following is acceptable behavior when approaching a roundabout?

When approaching a roundabout, yielding to traffic already in the roundabout is the correct behavior. This principle is crucial for maintaining a smooth flow of traffic and ensuring safety for all road users. Vehicles within the roundabout have the right of way, which helps prevent collisions and allows the roundabout to operate efficiently.

By yielding, you are allowing vehicles that are already circulating to pass, minimizing disruption and enabling a more orderly approach to merging in. This practice also helps drivers avoid abrupt stops or sudden lane changes that could lead to confusion or accidents.

The other behaviors mentioned, such as accelerating through the roundabout or stopping before entering, would disrupt the expected flow of traffic and could create unsafe conditions. Signaling left before entering may also be misleading, as it is more appropriate to signal your exit from the roundabout rather than your entry. Understanding these nuances helps reinforce safe driving practices around roundabouts.