Final answer:
A person going on a 20-minute bike ride would benefit from using a sports drink to rehydrate and replenish lost fluids.
Step-by-step explanation:
In this case, the person who would benefit from using a sports drink is (d) Someone going on a 20-minute bike ride. Sports drinks are designed to rehydrate the body after excessive fluid depletion, and a short bike ride can cause fluid loss through sweat. A sports drink can help replenish the lost fluids and provide electrolytes to prevent fatigue.