What must you do before making a three-point turn?

• Ensure you do not make a U-turn on a curved road, on or near a railway crossing or hilltop, or near a bridge or tunnel that obstructs your view.
  Explanation:

  "Make sure you do not make a three-point turn on a curve in the road, on or near a railway crossing or hilltop, or near a bridge or tunnel that blocks your view."
• Make sure the way is clear in both directions.
• Make sure there are no cyclists or pedestrians.
• All of the above