Answer:
The original 4 countries which held claims to the Oregon Country were Russia, Spain, Great Britain and Spain, Spain in which dropped out and the claim later went to the United States
Explanation:
Answer: The 4 spheres are the lithosphere (land), hydrosphere (water), biosphere (living things), and atmosphere (air).
Political Bosses were the leaders of the political machines, they grew wealthy because they assigned government contracts asking for favors like votes or promoting campaign on their favor, they also controlled financing of campaigns to later ask for recompense. By doing this they reached position in the local government of cities, counties and states and this way concentrated wealth around corruption.
The period in history between A.D. 395 and A.D. 1500 is known as the Middle Ages.
