To safely navigate through a roundabout, you should:

Answer: B — Merge with traffic and use your turn signals

The correct response emphasizes the importance of merging safely with traffic in a roundabout and the appropriate use of turn signals. When entering a roundabout, it's crucial to yield to any vehicles already circulating within it. Using your turn signals as you approach and while in the roundabout communicates your intentions to other drivers and contributes to smoother traffic flow. This practice not only enhances your safety but also that of other road users. In a roundabout, maintaining situational awareness and correctly signaling helps prevent misunderstandings and potential accidents. Proper signaling can ensure that other drivers are aware that you plan to exit the roundabout, thereby allowing them to anticipate your actions. The other options highlight misconceptions about roundabout navigation. For instance, entering from any lane can create confusion and lead to unsafe situations if drivers do not adhere to established lane rules. Stopping in the middle of a roundabout if you miss your exit can result in hazards for both yourself and other traffic. Relying on other drivers to let you in undermines your responsibilities as a driver; each individual should independently judge gaps in traffic without expecting others to adjust their behavior.