Under the effects of drowsiness...

A)it is harder to be dazzled by glare.
B)it is easier to react to a dangerous situation.
C)eye fatigue may appear.Correct
Under the effects of drowsiness, our ability to perceive our surroundings is impaired. For example, vision becomes blurred, it becomes harder to focus and eye fatigue may appear. 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 to do 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.