Under what conditions can an active lane change assist system perform a lane change?

Your answer is correct because an active lane change assist system can only perform a lane change when it detects a clearly marked road with multiple lanes (condition 1) and when there are no vehicles in the safety zone around the car (condition 2). This ensures the lane change can be done safely without risking collision with other vehicles. Condition 3, about oncoming traffic gaps, is not relevant because the system typically aids lane changes within the same direction of travel, not against oncoming traffic. Remember, these systems rely on clear lane markings and safe surroundings before initiating a lane change automatically.