What is the ideal position of the mirrors?

• When you can see the lane next to you completely and the lane behind you as much as possible
• When you can see the lane next to you and the ones next to you completely.
• When you can see the lane behind you and other lanes on the road next to you as much as possible
  Explanation:

  "Adjust each mirror so you can see the lane behind, and as much as possible of the other lanes on the road next to you."
• All of the above