What must you do when you hitch an unbraked trailer to a towing vehicle? What must you do when you hitch an unbraked trailer to a towing vehicle?

• Possible answers:

   
• A. Fit a secondary coupling device
• B. Grease the tow ball and hitch
• C. Switch off the reversing sensor on the towing vehicle
• D. Make sure you can see the trailer in the mirrors