One of the problems faced by farmers in the late 1800s was that railroads

Farmers faced Native American raids, poor growing conditions, droughts, disease, insects, and anything that would give farmers a hard time now. Farmers had to pay higher prices for transportation which caused less profit - crops prices fell which also caused less profit. The government issued greenbacks then retired them, causing an increase in the value of money in the circulation.

They charged high prices to transport the harvested crops ;)

Good luck: )

The correct answer is d