Answer:
They had a surplus of food, they divided labor and built cities.
After the development of the irrigation systems, they could grow more wheat and that meant more food for the growth of the population.
They divided labor between themselves. Who will harvest crops, who will tend to the irrigation systems, who will tend to fields. They had a lot of other workers such as carpenters or soldiers and that means that they knew how to divide labor between the population.
They started to build cities so they could work together, trade, store food, and the cities grew as more and more people came to live there.
I would say D because it is separated by two branches of government
Hope i helped
Let’s start with the basics first… The Dust Bowl was the name given to the drought-stricken Southern Plains region of the United States, which suffered severe dust storms during a dry period in the 1930s. As high winds and choking dust swept the region from Texas to Nebraska, people and livestock were killed and crops failed across the entire region. The massive dust storms caused farmers to lose their livelihoods and their homes. Deflation from the Depression aggravated the plight of Dust Bowl farmers. Prices for the crops they could grow fell below subsistence levels. In 1932, the federal government sent aid to the drought-affected states. Now here is why it stopped or how we stopped it. While the dust was greatly reduced thanks to ramped up conservation efforts and sustainable farming practices, the drought was still in full effect in April of 1939. In the fall of 1939, rain finally returned in significant amounts to many areas of the Great Plains, signaling the end of the Dust Bowl. Hope this helps!
Fifteenth Amendment to the United States Constitution
The United States and the Soviet Union came to the brink of nuclear war in 1962 over Soviet missile bases in Cuba. This was referred to as the "Cuban Missile Crisis". The US was mostly concerned about the very close proximity of the missiles to its shores.
