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According to the price confusion problem, if the price of a product increases, then:a.prices as a whole fall, and the firm’s output should increase.b.the price increase is due to inflation, and the firm’s output should increase.c.the market demand has increased, and the firm’s output should decrease.d.the market demand has increased, and the firm’s output should increase.e.the price increase is due to inflation, and the firm’s output should decrease.