Correct answer
It increases reaction time.
Sleepiness causes a driver's reaction time to an unexpected event to increase, adding to the seconds it takes to make decisions and leading to more errors due to a lack of concentration while driving. In addition, under the effects of sleepiness, the movements and manoeuvres carried out by the driver will be slower and less precise, and will tend to become more automatic.
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It reduces distractions.
It increases reaction capacity.
It increases reaction time.
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