Answer: reduced storage and shipping costs for farmers
Explanation:
Populism emerged from the demand of the small scale farmers for agrarian reform in the Great Plains, Rockies, and the cotton-belt states.
The farmers started their revolt by founding the National Grange of the Patrons of Husbandry in 1867. The Grange used its political power to approve farmer-friendly laws, such as the Granger Laws, which established maximum railroad prices.