Answer is A. America didn't gain European territory, they loaned money to <em>Germany</em>, in order to pay repairment debts that Germany had with other countries and these, in turn, paid their debts to America, in dollars.<em> </em><em>Prior</em> to the war, some industries were able to export <em>without restrictions</em>, but, with the declaration of war, that ended.
The following was not a factor in American prosperity following WWI: America gained European territory after that war and was able to export products to Europe and Africa without economic barriers. After World War I the US continued enforcing high tariffs, which was one of the main sources of revenue for the country. When a country has tariffs on imports, it means that it's products have tariffs on the given country's exports. This is because there wasn't a free trade agreement between the US and Europe. On the other hand, the world took a protectionist approach after WWI by enforcing high tariffs. Also, after WWI the gold standard was abandoned despite the efforts that were made to reenforce it. Finally, WWI put restriction on the movement of financial capital. With the end of WWI, African countries were granted their independence and the United States did not gain any European territory.
The case of Marbury vs. Madison had a big impact on the equality of power between the three branches of government. It helped establish the judiciary act. This allowed the Supreme Court to decide whether a law was constitutional or unconstitutional, giving this branch more power.
