When you feel fatigue at the wheel, you should bear in mind that...

A)glare is constant.
B)effects similar to a blood alcohol level of 0.5 grams per litre of blood are produced.
C)sleepiness can come on at any moment.Correct
Fatigue and drowsiness are two phenomena that very frequently appear together; driving tired generates drowsiness and, likewise, driving drowsy promotes the onset of fatigue at the wheel.
The most important rules to avoid having an accident due to sleepiness or fatigue are:
- If we feel tired or sleepy 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 sleepiness or fatigue.