The correct answer to this open question is the following.
Although there are no options provided, we can say the following.
The Grangers, who were largely poor farmers, battled with the giant railroad companies by inviting people to join them to take political actions so the government could hear their demands. The Grangers supported politicians who wanted to run for office or be representatives. Grangers wanted legislators to support legislation that could help in resolving their problems. After so much hard work and effort, Congressmen passed legislation that established maximum freight rates, passenger rates and did not allow any kind of discrimination. For this to happen, Grangers had to get the support from farmers in the Southeast, west, and midwest of the United States.