I just did this section and took a midterm on it. They lived mostly in the south. Oklahoma was known for either the African Americans or the Immigrants. But, it will mostly be in the south. Hardly will you find them living in the east throughout all of history.
The answer is a.
The Populist Party was originally formed by farmers in response to the growing threat big companies had on them. So that rules out b through d.
If you want me to give you a more detailed explanation of the Populist Party, let me know because I just had a final on this in college. :)
Answer:
C. stop the white settlement of their land.
Explanation: