The correct answer is letter C.
From the beggining of the 20th century to the start of World War II there was a huge rollercoaster happening in the wheat business.
The prices climbed sharply before World War I and peaked after its end. European farm production was able to guarantee years of low prices and the American agriculture was deemed to a great depression even before the stock market crash of 1929. The prices climbed in the mid-1930s and then plunged again. Not until World War II did America sustained increases in price and demand.
The 4th class was required to go to ellis island.
Zimmermann telegram- Nothing like negotiating with a neighbor to invade their front lawn.
Unrestricted submarine warfare- Sinking ships owned by the US constantly is already making us angry.
and the sinking of the Lusitania- Now this wasn't the final straw but it did indeed shake US support for Germany and caused outrage all over the USA.
Economic: The south lost much of its agricultural land due to it being destroyed in battles, and the loss of slavery meant serious economic downfall because their industry relied heavily on slave labour. However, the North was more industrialised, so it benefitted from the added railroad and the manufacture of wartime products.
Social: 2% of the population was killed; many lost loved ones and family members. Also, racial prejudice resulted in the formation of the KKK by many whites who were angry that African-Americans had been freed-- as well as the Jim Crow laws being enforced
Political: 13th, 14th and 15th amendments passed in the constitution