4.    The competitive market system: A.    encourages innovation because government provides tax breaks and subsidies to those who develop new products or new productive techniques. B.    discourages innovation because it is difficult to acquire additional capital in the form of new machinery and equipment. C.    discourages innovation because firms want to get all the profits possible from existing machinery and equipment. D.    encourages innovation because successful innovators are rewarded with economic profits.单项选择题

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