What should you do if your brakes fail while driving and using the parking brake doesn't help?

• Continue driving at a reduced speed.
• Shift to a lower gear and apply the parking brake again.
• Stay on the road and turn on emergency flashers.
• Turn off the engine, pull off the road, and turn on emergency flashers.
  Explanation:

  "If your brakes fail while driving and using the parking brake doesn't work, turn off the engine, pull off the road, and turn on emergency flashers."