220 - X Find the marginal revenue product dR/dn for a manufacturer with 12 workers if the demand function is p(x) = -, and if x = 3n. 4 (For help, see Example 12 on page 648 of the textbook/ebook.) . . . (Round to two decimal places as needed.) O A. Hiring an additional employee will increase the production by items. O B. Producing an additional item will require more employees. O C. Producing an additional item will increase the revenue by $ O D. Hiring an additional employee will increase the revenue by $