Company C manufactures cleaning products and supplies its products to Company D, which is a hardware retail store. Company C demanded that Company D make more shelf space available for its products, or it would take its products to a different hardware retail store. Company D refused Company C's request and started producing its range of cleaning products labeled under its name. Company D has exercised its bargaining power as a buyer through a. forward integration. b. decreasing switching costs. c. backward integration. d. enhanced technology