Two rubber companies, Boing and Twang, are currently producing along, and polluting, the same river. Both companies are considering whether to install pollution filters on their factories. These filters cost $15 million each. If a filter is installed, there is a benefit of $20 million, but this benefit is divided equally between the two companies. If both firms install the filters, then Boing will earn ________ and Twang will earn ________ .

A. $0 million, $0 million

B. -$5 million, -$5 million

C.$5 million, $5 million

D.$10 million, $10 million