The following information is provided for Sheridan Company and Grouper Corp.:

(in $ millions)	Sheridan Company	Grouper Corp.
Net income 2017	$120	$445
Net sales 2017	1390	4510
Total assets 12/31/15	1050	2120
Total assets 12/31/16	1070	3140
Total assets 12/31/17	1195	4090

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

10.9%

11.1%

14.2%

12.3%