Final answer:
In a roundabout, you should stay in your lane until ready to exit, using the appropriate signal at that time for safety and to avoid confusion.
Step-by-step explanation:
When inside a roundabout, the correct behavior is to remain in your lane until you are ready to exit. It is not advisable to use your left turn signal while planning to exit right now, as it could confuse other drivers. Changing lanes before checking for vehicles behind you can also lead to accidents. Therefore, the answer is to stay in your lane and use the appropriate signal when you are ready to exit the roundabout.