Answer:
D). A person must have the courage to act despite a small chance of succeeding.
Step-by-step explanation:
The last statement i.e. 'a person must have the courage to act despite a small chance of succeeding' most aptly expresses the theme of 'Gumption' as displayed. The short story explores the depression era when the majority of the population were rendered jobless and led people to take rash actions due to this powerlessness brought by this economic backwardness(represented by Oyster and his son). Thus, option D is the correct answer.