It was established after WWII in order to make sure something like it would not happen again.
Answer:
B. Westward expansion
Explanation:
The transcontinental road in the United States linked the east and the west. In 1949 settlers started to move to the west as a result of the discovery of gold in California, the journey involved was very tiresome and dangerous because people had to travel pass mountains and rivers, but there was another alternative which involves traveling by the sea for about 8 months. This lead to the construction of the international railroad making transportation easier and cheaper
The most important social consequence generated the economic crisis was unemployment. In the beginning, unemployment was about 500000 but in 1930 this number rose to 3250000. This unemployment generated an increase in the number of hoboes. As people lost their jobs and savings, and couldn't keep up set up homes mortgages on many homes were foreclosed. Many people lacked adequate food, shelter, and clothing.
The consequence of the Great Depression in rural areas was the worsening of farmers condition. Farmers who usually contracted debts to expand production and buy agricultural machinery found themselves in a very vulnerable situation with the loss of domestic and international markets. Faced with the loss of everything, desperate farmers defied the law. Angry mobs stopped foreclosures and threatened to lynch the judges sanctioning them.