A. Native Americans...Slaves B. African Americans...Native Americans

C. Immigrants...Native Americans

D. Immigrants...Missionaries

B. African Americans and Native Americans,

because the U.S. "buyed" land from the Native Americans and tricked them into thinking they were going to be moved to a better area, when really they got moved to a barren land. And it says African American on the second one.

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.