What can reduce the risk of serious accidents when turning right within a built-up area?

You are correct in selecting options 1 and 2. In built-up areas, turning right can be risky because of pedestrians, cyclists, or other vulnerable road users who may be in your blind spot. Equipping vehicles with turn assist systems (option 1) helps detect such road users and can warn the driver or even intervene to prevent collisions. Driving at walking speed when turning right (option 2) gives you more time to observe and react to any hazards, reducing the chance of serious accidents. On the other hand, taking right turns quickly (option 3) is dangerous because it decreases reaction time and increases the risk of colliding with pedestrians or cyclists. Therefore, slowing down and using driver assistance technologies are key safety measures.