ANSWER IS A. Old Spanish trail
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The phenomenon that triangular trade most directly encouraged was slavery. The first part of the triangle was the crossing of the Atlantic Ocean by Europeans wishing to sell their products. With the money obtained the europeans would buy slaves; sometimes they would just trade the products they brought directly for slaves. The same european ships would then sail to America to sell the slaves as plantation labourers. With the money obtained the europeans bought raw products like cotton and took them to Europe for further processing. The complete cycle took like a year.
The Treaty of Versailles helped pave the way for the Nazi party to gain control of Germany by creating resentment and anger among the German people. Many German people were very resentful of their government (the Weimar Government) for having signed the peace Treaty in June 1919, since the terms of the Treaty were indeed very harmful to Germany: it took territory from the country, it forced it to pay reparations, and (and this term really caused indignation about the Germans) it blamed it and her allies for having started the war.
Since the Weimar Government was not popular and the country was facing tremeduous economic and social problems, the Nazis were able to gain the support of the German people, and eventually had the control of Germany.
Real GDP per capita for the United States is calculated by dividing real GDP by the number of people living in the country.
As the war dragged on, the unions advantages in factories, railroads, and man power out the confederacy at a great disadvantage