Tibbs Inc. had the following data for the most recent year: Net income = $300; Net operating profit after taxes (NOPAT) = $330; 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. 14.75%

b. 15.15%

c. 14.35%

d. 14.55%

e. 14.95%