Why should you tell your pupil to obey the speed limit shown on this sign? Why should you tell your pupil to obey the speed limit shown on this sign?

• Possible answers:

   
• A. To reduce the amount of chippings thrown up by the tyres
• B. To prevent other drivers from driving too fast over the chippings
• C. To prevent damage to the new road surface
• D. To comply with the law