Final answer:
When driving inside a roundabout, you should stay in your lane until you are ready to exit, and use your right turn signal when safe and applicable to indicate your intention to exit the roundabout. D. Stay in your lane until you are ready to exit.
Step-by-step explanation:
When you are driving inside a roundabout, it's important to follow specific rules to ensure safety and the efficiency of the traffic flow. The correct option from those provided is to stay in your lane until you are ready to exit. You should not switch lanes without looking, which could cause an accident.
You are not required to circle the entire roundabout before exiting, you should exit at your intended exit. Regarding signaling, you should use your vehicle's right turn signal (not left), if it is safe and required by law, to indicate your intention to exit the roundabout. It's important to note that while driving in a roundabout, you must always yield to traffic already in the circle and observe all traffic signs and signals.