To prevent fatigue, you should stop to rest for 20 or 30 minutes...

A)every 4 hours or 400 kilometres of continuous driving.
B)halfway through the journey.
C)every 2 hours or 200 kilometres of continuous driving.Correct
The most important rules to avoid having an accident due to drowsiness or fatigue are:
- If we feel tired or drowsy while driving, the most advisable thing is to stop and rest in a suitable place and sleep for about 20 or 30 minutes.
- Rest for 20 to 30 minutes every 2 hours or every 200 kilometres at most.
- Always be alert to the signs and symptoms of drowsiness or fatigue.