Why can reversing out of a parking space be hazardous?

• Because it is difficult to see traffic as you move out of the space
  Explanation:

  "Reverse carefully and slowly. Be sure there is nothing behind your vehicle. Reversing can be hazardous because it is difficult to see traffic as you move out of the space."
• Because your steering wheel will not turn right during reversing
• Because the signal light will not be operable during reversing
• Because it is easy to steer wheels during reversing