The following information is provided for Wildhorse Co. and Swifty Corporation: (in $ millions) Wildhorse Co. Swifty Corporation Net income 2017 $135 $380 Net sales 2017 1745 4660 Total assets 12/31/15 1095 2270 Total assets 12/31/16 1210 3200 Total assets 12/31/17 1175 4100

What is Swifty's return on assets (rounded) for 2017?

11.9%

11.1%

9.3%

10.4%