Which of the following statements about agriculture in the U. S. is correct? a. Technological improvements typically increase both supply and revenue for individual farmers. b. Technological improvements that increased supply, coupled with inelastic demand for foodstuffs, explain why the number of farmers has decreased dramatically over the last century. c. Because technological improvements increase the supply of a product for which demand is inelastic, an individual farmer would be better off not adopting the new technology. d. All of the above are correct.