The year-end financial statements of Time Company reveal average shareholders' equity attributable to controlling interest of $820,537 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 $347,326 thousand. The company's return on net operating assets (RNOA) for the year is: Select one: a. 13.8% O b. 8.4% O C. 42.3% O d. 5.5% o e. There is not enough information to calculate the ratio