D because nationalism has bastion
The correct answer to this open question is the following.
You did not include any particular reference so we do not know the documents you include as reference.
However, trying to help you we can comment on the following.
It is correct to say that the "Gilded Age" usually refers to business and worker interests in the period after Reconstruction to about 1900.
The aspect of the farmers’ experiences during this time that is similar is that they suffer many problems and tribulations during the Gilded Age, as was the case of the workers that labored in the big industries in the larger cities such as New York, Chicago, or Pittsburgh.
The American farmers were living in deep debt during the Gilded Age. They knew they had the risk of losing their properties and farms due to that debt. It was a time when the prices of the crops were down, making things worse. Another issue was the price railroads charged to transport their crops. It was too expensive for farmers.
During this Gilded Age, corruption actions in the government allowed the creation of monopolies as was the case of the Standard Oil Company owned by John D. Rockefeller or the US Steel Company owned by Andrew Carnegie.
B because it is B that is good!
