Approaching a roundabout in the right lane and intending to turn left, you should:

When approaching a roundabout in the right lane and intending to turn left, you should indicate and switch to the left lane before entering the roundabout. This is the correct action because it helps to ensure clarity for other drivers about your intended maneuver, promotes safe navigation of the roundabout, and aligns with traffic regulations regarding lane usage.

By signaling your intent to switch lanes and executing the maneuver before the roundabout, you provide time and space for other road users to understand your actions. This proactive approach helps prevent confusion or accidents, particularly since roundabouts involve merging traffic and can be dynamic in nature.

The other actions, such as going straight without signaling, speeding up to merge with traffic, or switching lanes after entering the roundabout, do not effectively communicate your intentions to others on the road, which may lead to unsafe situations. Ensuring proper lane positioning and signaling is essential for safe driving behavior, particularly in complex traffic situations like roundabouts.