The correct answer is B) they showed the country that integration could be successful.
The statement that best describes how Branch Rickey and Jackie Robinson affected the American culture is "they showed the country that integration could be successful."
Branch Rickey was the General Manager of the Major League Baseball team the Dodgers that trust its intuition and hired African American baseball player Jackie Robinson, a skilled athlete like never seen before in Professional baseball. Although the decision was heavily criticized, in the end, it resulted in positive and open doors for other Latin and African American athletes to compete in professional sports.
The other options of the question were A) their actions led to the segregation of most American sports. C) They were the first African American players in Major League Baseball. D) Their actions challenged the defense industry to integrate.