14. Of the programs offered by the federal government, the largest program in the United States is a. social insurance; Medicaid b. social insurance; Social Security c. means-tested; farmers' aid d. means-tested; Social Security 15. The aggregate production function Y = f ( L , H , K ) shows that economic growth can occur if: (i) labor force participation rates fall. (ii) human capital stays constant. (iii) education and worker skills improve. (iv) the depreciation rate increases. a. (i) only b. (i) and (iv) c. (i), (ii), (iii), and (iv) d. (iii) only .