Why are you required to stop now?

You are correct in choosing the answer "Because of the electric scooter." In German traffic law, when turning right, you must always watch for and give way to pedestrians and electric scooter riders who are crossing the street onto which you are turning. They have priority, even if you have the right of way on the road itself. This rule ensures the safety of vulnerable road users at intersections and crosswalks. In this situation, it is required to stop to let the rider on the electric scooter pass safely before you make your turn. Knowing and applying this rule will help you recognize and correctly handle situations involving pedestrians and electric scooter users when turning.