C. The Oregon Country
The Oregon Country was acquired in June 1846, at a time of James K. Polk's term, a president characterized for his advocacy for American westward expansion
The United States' occupation of Oregon Country started in 1818 by Britain's consent. And by the 1840s, Americans outnumbered British people. In 1845, the United States tried to negotiate the division of the Oregon territory, and a year later in June, both nations finally agreed to divide the territory at the 49th parallel.
"Oregon Country" is now the American's states of Oregon, Washington, and Idaho, as well as portions of Montana and Wyoming.
Answer:
Economic, Environmental and political.
Explanation:
Permanent move from one country to another due to various reasons is called migration. Throughout history people has moved from one place to another to explore their world. Migration has impacted world culture since its beginning.
There are three main causes for migration, It falls into three categories: Economic, Environmental and political. While speaking of migrations experts talk about push and pull factors.
The factors that push people out of an area are called push factors while the factors that pull people toward an area is called pull factor. Ex. while talking about the environment lack/depletion of natural resources can be a push factor while availability of land at some other place can be a pull factor.