<span> the miners found gold in the West, leading to the creation of New States</span>
D Because it does not run north to south, it was completed after the Civil War, and it didn't really help to ship cotton to Britain more quickly.
Option B, to create free trade, is the right answer.
Trade agreements are formed when two or more countries agree on the conditions of commerce among them. The trade agreement are made to boost trade in the process of the economic boost. These agreement achieves its goal by reducing or even eliminating restrictions to trade across international borders and creating an atmosphere for free trade. The trade agreement are made to set up the tariffs and customs that the nations impose on the exports and imports. Countries participating in the trade agreements generally seeks improved opportunities for their business.
Many european nations and america desired to expand their "spheres of influence" and control parts of China for their own 'empire', which enables the nations to get more resources and other 'exotic' things that they do not have in their native lands.