Concept:Controlling inflation requires reducing excess demand or increasing the supply of goods at lower costs.Explanation:Increasing productivity raises output and lowers production costs, helping to reduce inflationary pressure.Reducing income tax raises disposable income, which can increase demand and worsen inflation.Rationing output is a temporary measure, not an effective long-term solution.Increasing imports may increase supply but can harm domestic production and the balance of payments.Answer:A. increase productivity