Correct answer
It may delay the onset of sleepiness.
Driving a vehicle with a blood-alcohol level above the legal limit can affect the risk of being involved in a road accident because the driver's abilities are impaired. Among other effects, alcohol promotes the onset of sleepiness, increases reaction time and reduces the driver's field of vision.
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It may reduce reaction time.
It may delay the onset of sleepiness.
It may promote the onset of sleepiness.
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