What should you do to prevent your parked vehicle from rolling down a hill?

• Set your vehicle’s park brake.
• Set your transmission in park or a lower gear.
• Park at an angle from the curb.
• Both A and B
  Explanation:

  "To prevent your vehicle from rolling, always set the park brake and place the transmission in park (for automatic) or in a lower gear (for manual). This provides extra security, especially on steep hills."