Final answer:
In the folklore of 'John Henry,' no one substitutes for him when he becomes sick; the story depicts his individual struggle and sacrifice.
Step-by-step explanation:
In the American folklore story of 'John Henry,' when John Henry becomes sick, no one substitutes for him. The legend of John Henry is a testament to the strength and endurance of the human spirit, where John Henry, a steel-driver, competes against a steam-powered hammer to prove the worth of human labor, eventually leading to his death from exhaustion. It is a story that symbolizes the struggle during the industrialization of America, rather than a literal recount of events where a person substitutes for another. Therefore, the answer to the question would be none of the listed options as the folklore focuses on John Henry's individual efforts and ultimate sacrifice.