The annual financial statements of Naperville Inc. shows net operating profit margin (NOPM) of 11.4%, net operating asset turnover (NOAT) of 3.83, return on equity of 29.9%, and adjusted return on assets of 17.1%. What is the company's nonoperating return? Select one: C a. -12.8% b. There is not enough information to calculate the ratio. C.-13.7% d. 35.5% e. 18.5%