When parking a tractor-trailer on level ground, where should you place wheel chocks and how?

When parking a tractor-trailer on level ground, where should you place wheel chocks and how?

• A. Place chocks only in front of the tractor wheels.
• B. Place chocks only behind the trailer wheels.
• C. Place chocks against the wheels on both sides of the tires that could move, in front of and behind the trailer wheels.
• D. Do not use wheel chocks on level ground.

Answer: (C)