The difference between zero accounting profit and zero economic profit is that a. economists do not include opportunity cost in zero accounting profit, while accountants do include opportunity cost in zero economic profit. b. economists include opportunity cost in zero accounting profit, while accountants do not include opportunity cost in zero economic profit. c. economists include opportunity cost in zero economic profit, while accountants do not include opportunity cost in zero accounting profit. d. economists do not include opportunity cost in zero economic profit, while accountants do include opportunity cost in zero accounting profit.