What should you do if your brakes fail?

• Use the vehicle's horn to let everyone know
• Apply the parking brake gently
• Call emergency helpline
• None of the above
  Explanation:

  "If your brakes fail, first pump the brake pedal to try and restore hydraulic pressure. If this doesn’t work, apply the parking brake gently but firmly while holding the release button to maintain control. Use your horn to alert others only if necessary."