Why should you adjust the outside rearview mirrors?

• To reduce blind spots
  Explanation:

  "Adjusting the outside rearview mirrors properly helps minimize blind spots, improving your overall awareness of surrounding traffic. To do this, position the mirrors so that you can see a small portion of your vehicle in the inner edge of the side mirror while maximizing your view of adjacent lanes."
• To see behind your vehicle
• To let other drivers see your face
• To see the lane next to you