What are the risks in making a U-turn?

1. Delaying vehicles that are coming from the opposite direction or from behind
2. Colliding with vehicles coming from the opposite direction or from behind.
3. Correct answer: All the answers are correct.
4. Causing an approaching vehicle to make a sudden brake.

WhyA U-turn can hold others up, force them to brake hard and end in a collision with oncoming traffic or with those behind. All the answers are correct.