The opportunity cost of redeeming a $1 cash back offer is $2, when you include the time cost of filling out the redemption form and mailing back the offer. Redeeming the cash back offer is Question 20Select one: A. not a smart choice because the marginal benefit is less than the marginal cost. B. not a smart choice because the marginal benefit is greater than marginal cost. C. a smart choice because the marginal benefit is less than marginal cost. D. a smart choice to redeem because the marginal benefit is greater than the marginal cost. E. None of the other choices are correct