Concept:Factors of production earn specific rewards, and a subsidy is not one of them.Explanation:Each factor of production receives a distinct income for its contribution.Land earns rent.Labor earns wages or salaries.Capital earns interest.Entrepreneurship earns profit.A subsidy is a government payment or financial support, not a payment made by the production process to a factor of production.Therefore, subsidy is not a reward for a factor of production.Answer:D. subsidy