Answer: B. It represents the main route for settlers moving into the Oregon Territory.
Explanation:
In the early 1800s Americans were encouraged to stretch the USA from the east coast to the west coast in what was called the Manifest destiny. The line above aided in this venture as it enabled people to reach Oregon to the west of the United States.
Rightfully named the Oregon Trail, the line went through four states and allowed hundreds of thousands of people to move to Oregon and other areas in western USA thereby paving the way for the assimilation of those territories into the United States.
It did not lead to the Civil War, what led to the civil war was the war of 1812. That was when U.S.A recognized that it needed to become stronger, and slaves were transported to the United States and put in the working class under bad conditions. Child labor and prejudice began there as well.
This is referred to as Nationalism. It is the notion or belief that one's country possesses qualities or traits not found in that of other nations. It often promotes a sense of exceptionalism and superiority; therefore, it has often led to <em>Chauvinism </em>which is a rather hostile form of Nationalism and is often utilised as a political tool to achieve an ends.
It turns the top soil and any remains crop over, producing fertilizer. It breaks up the soil for easier planting. By turning over the soil, weeds are reduced. Hope this helped!