The profit-maximizing firm hires an economist that finds that the optimal output is equal to 10. If the firm is currently producing an output equal to 8, by expanding their output to 10, they can expect to: Question 8 Select one: a. add the same amount to total revenue as to total cost. b. add to total revenue but not to total cost. c. add more to total cost than to total revenue. d. add more to total revenue than to total cost