Answer:
A. Serbia,
Why: It achieved independence in 1867.
Answer: Supreme Court Justice Earl Warren delivered the unanimous ruling in the landmark civil rights case Brown v. Board of Education of Topeka, Kansas. State-sanctioned segregation of public schools was a violation of the 14th Amendment and was therefore unconstitutional.
The federal government wanted to assimilate and introduce the natives to the American way of living and to integrate them into the society.
This is something you have learned. It's telling you the definitions of some words, and you have to write down what word is it.
Example: Number one is executive branch: Branch that enforces laws
Hope it helps