Tibbs Inc. had the following data for the year ending 12/31/2015: Net income = $300; Net operating profit after taxes (NOPAT) = $320; Total assets = $2,500; Short-term investments = $200; Stockholders' equity = $1,800; Total debt = $700; and Total operating capital = $2,300. What was its return on invested capital (ROIC)?

Select the correct answer. a. 13.91% b. 13.61% c. 13.31% d. 14.21% e. 14.51%