The 2016 Financial Statements of the New York Times Company

The 2016 financial statements of The New York Times Company reveal average shareholders' equity attributable to controlling interest of $837,283 thousand, net operating profit after tax of $48,032 thousand, net income attributable to The New York Times Company of $29,068 thousand, and average net operating assets of $354,414 thousand.
The company's return on net operating assets (RNOA) for the year is:

A) 3.5%
B) 6.9%
C) 13.6%
D) 18.7%
E) There is not enough information to calculate the ratio.