They were put onto reservations to accommodate settlers and were forced to assimilate into American culture.
The correct answer should be African-Americans
They were segregated and had hard times finding jobs and when they did manage to get them, it was mostly low-skilled low-paying physical jobs like carrying bags of cement or loading ships in the docks. When the great depression came, they lost even this because white workers were prepared to do even those jobs so they lost even the little wage that they had.
C. huge tunnels were built for sewer lines