If your vehicle sinks into water and you can't get out immediately, what should you do to increase your chances of escape?

• Climb into the rear seat.
  Explanation:

  "If your vehicle sinks before you can get out, climb into the rear seat. An air pocket may form there. When the vehicle settles, take a deep breath and escape through a window."
• Open all windows immediately.
• Panic and attempt to exit quickly.
• Wait for rescuers to arrive.