What is the primary cognitive risk of hypothermia for a motorcycle rider, and how should it be prevented?

1. Loss of physical strength in the legs; prevent by using lower gear ratios
2. Loss of concentration, slow reflexes, and impaired decision-making; prevent by wearing windproof, insulated layers
3. Increased perspiration leading to dehydration; prevent by drinking energy drinks
4. Rapid eye fatigue; prevent by wearing tinted lenses