The following information is provided for Ivanhoe Company and Bridgeport Corp.:

(in $ millions)

Ivanhoe Company Bridgeport Corp.

Net income 2017 $130 $420

Net sales 2017 1510 4780

Total assets 12/31/15 1095 2190

Total assets 12/31/16 1170 3060

Total assets 12/31/17 1200 4050

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

(a) 10.4%

(b) 13.7%

(c) 11.8%

(d) 11.0%