The year-end financial statements of Time Company reveal average shareholders' equity attributable to controlling interest of $828,910 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 $350,870 thousand. The company's return on net operating assets (RNOA) for the year is: Select one: O a. There is not enough information to calculate the ratio. O b. 13.7% c. 42.3% O d. 5.4% O e. 8.3%