You're driving on a motorway and have to slow down suddenly due to a hazard ahead. How can you warn drivers behind of the hazard? You're driving on a motorway and have to slow down suddenly due to a hazard ahead. How can you warn drivers behind of the hazard?

• Possible answers:

   
• A. Switch on your hazard warning lights
• B. Switch on your headlights
• C. Sound your horn
• D. Flash your headlights