The year-end financial statements of Time Company reveal average shareholders' equity attributable to controlling interest of $845,656 thousand, net operating profit after tax of $48,032 thousand, net income attributable to the company of $29,068 thousand, and average net operating assets of $357,958 thousand. The company's return on net operating assets (RNOA) for the year is: Select one: O a. 13.4% b. 8.1% c. There is not enough information to calculate the ratio. d. 42.3% O e. 5.3%