The correct answer is: Many Americans in rural areas felt that their way of life was being threatened.
During the 1920s, the rapid growth of immigrant populations in urban areas led to concerns and fears among many Americans, especially those in rural regions. They perceived that their traditional values, customs, and way of life were being challenged by the new cultural influences brought by immigrants. This resulted in a cultural backlash, manifesting in various forms, including nativism, xenophobia, and the rise of organizations like the Ku Klux Klan that focused on maintaining what they viewed as American ideals.