Final answer:
The Brooklyn Dodgers decided to sign Jackie Robinson to challenge racial segregation in baseball by breaking the color line and inspiring other teams to integrate.
Step-by-step explanation:
The Brooklyn Dodgers decided to sign Jackie Robinson to c) challenge racial segregation in baseball. Branch Rickey, the General Manager of the Dodgers, recognized that integrating the team would not only make them better by adding a talented player like Robinson, but also help to challenge the racial segregation that existed in baseball at the time. By breaking the color line and successfully playing in the Major Leagues, Robinson inspired other teams to integrate, paving the way for more opportunities for African American athletes.