The correct answer is C) they showed the country that integration could be successful.
What best describes Branch Rickey and Jack Robinson was that they showed the country that integration could be successful.
Branch Rickey was a Major League Baseball executive that was famous for signing the first Major League African American player: Jackie Robinson. Rickey was a white man that consider that black people could be part of a Major Baseball League roster, although his decision was criticized by many. Robinson ended up being a superstar and his presence in professional baseball open the path to other minorities in professional sports. Yes, it's true, that Branch Rickey and Jack Robinson showed the country that integration could be successful.