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D Question 21 5.68 pts MC ATC 18 P1-MRI -Po-MRa 9.6 800 900 1,000 10 20 24 Answer the following question based off of the graphs above, which depict a perfectly competitive industry and firm: Suppose the industry or market is now in equilibrium at point B. What could have caused the market equilibrium to change from point A to point B? An increase in society's income, which caused the demand curve to shift to the right O A decrease in society's income, which caused the supply curve to shift to the right O Firms exiting the market. This caused the price to increase in the market. An increase in profits, which led to an increase in supply. This caused the price in the market to increase