Final answer:
When entering a roundabout, you should use your turn signal, obey traffic signs and yield to traffic already in the circle.
Step-by-step explanation:
When entering a roundabout, there are certain rules and behaviors you should follow:
- Use your turn signal to indicate your intention and which exit you plan to take.
- Obey traffic signs and pavement markings to ensure a smooth flow of traffic.
- Yield to traffic already in the circle before entering.
Therefore, the correct answer is D) All of the above.