When you are driving behind a large vehicle:

1. AKeep the smallest possible distance from the vehicle ahead of you.
2. BOn an uphill - keep a small distance; on a downhill - keep double the distance.
3. CKeep a greater distance from the vehicle ahead of you only when a "general danger" sign is posted.
4. DKeep a greater than usual distance from this vehicle, in order to prevent an accident.

Pick an answer to test yourself