Accidents caused by drowsiness occur...

A)always at night.
B)only when the driver falls completely asleep.
C)also before the driver falls completely asleep.Correct
To suffer an accident due to drowsiness, it is not necessary to fall completely asleep. While driving, risks related to drowsiness appear long before the driver actually falls asleep. The first symptoms of drowsiness already affect driving.
The most important rules to avoid suffering 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.