When some people reacted negatively to Jackie Robinson presence on the Brooklyn Dodgers, baseball officials

The correct answer to the following question will be "actively worked to stop the dissent".

Explanation:

The popularity of Jackie Robinson throughout Major League Baseball caused whites to affect their opinions regarding minorities. Whenever some people have responded adversely or harshly to the involvement of Jackie Robinson on either the dodgers, baseball authorities were working aggressively to avoid the opposition.

So that the above is the right answer.