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Average total cost curve in pure economic profit

No firm can ever generate a pure economic profit unless this: (i) possesses some market power or monopoly power. (ii) can adjust both its level of output and the price of its products. (iii) faces a demand curve with a segment above its average total cost curve. (iv) is protected from competition by barriers to entry. (v) adjusts its technology so that its average total cost is the minimum possible.

Please choose the right answer from above...I want your suggestion for the same.

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