Correct answer
Blurred vision, frequent blinking and slower reactions.
Fatigue may cause blurred vision, more frequent and longer blinking, and slower reactions. These are warnings to stop in a safe place and rest. Fatigue does not improve vision, concentration or response speed.
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Faster reactions and more precise vehicle control.
Sharper vision and greater ability to concentrate.
Blurred vision, frequent blinking and slower reactions.
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