When are you allowed to make a U-turn?

Answer: D — At an uncontrolled intersection

At an uncontrolled intersection, you are allowed to make a U-turn as long as there are no signs prohibiting it. Making a U-turn in an intersection (choice A) or on a one-way street (choice B) is typically not allowed as it can be dangerous for other drivers. In a residential area (choice C), U-turns are generally not permitted due to the presence of pedestrians and children playing. Therefore, D is the only safe and legally acceptable option for making a U-turn.