Prices of hamburgers in the fast food industry (assume that this is an inferior good) have decreased steadily in recent years. Over this same period, prices of meat preservatives (used in the preparation of hamburgers) have dropped and consumer incomes have decreased. Which of the following best explains the decreasing prices of hamburgers? A. The supply curve for hamburgers has shifted to the right more than the demand curve has shifted to the right. B. The supply curve for hamburgers has shifted to the right while the demand curve for hamburgers has shifted to the left. C. The demand curve and the supply curve for hamburgers have both shifted to the left. D. The demand curve for hamburgers has shifted to the right more than the supply curve has shifted to the right