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Question 17 (1 point) lf we add successive laborers to work a given amount of land on a wheat farm, eventually | OC) the increases in wheat harvested will get smaller and smaller C) the increases in wheat harvested will rise at a constant rate C) the increases in wheat harvested will get larger and larger C) average total cost will fall to zero Question 18 (1 point) An increase in long-run average costs resulting from increases in output is C) attributed to economies of scale C) attributed to the law of diminishing marginal product C) attributed to constant returns to scale C) attributed to diseconomies of scale Question 19 (1 point)