For the Constitution to take effect, nine states required to ratify it, according to Article VII. The state conventions served other purposes in addition to the legal requirements for ratification. During the Philadelphia convention, the Constitution was drafted in complete secrecy.
The 1920s were a period of dramatic changes. More than half of all Americans now lived in cities and the growing affordability of the automobile made people more mobile than ever. Although the decade was known as the era of the Charleston dance craze, jazz, and flapper fashions, in many respects it was also quite conservative. At the same time as hemlines went up and moral values seemed to decline, the nation saw the end of its open immigration policy, the revival of the Ku Klux Klan, and the trial of a Tennessee high‐school teacher for teaching evolution.
I am not sure if this is the answer you are looking for but I gave it a try!!
C: The world depends on oil produced by Gulf countries, such as Kuwait
The Persian Gulf is a region that is very important to the world, and the reason for this is that there is lot of oil and natural gas reserves in this region. These are actually the only two things that the Persian Gulf can offer to the world, but nonetheless, they are crucial for every country's economy in the world, so there is a heavy dependence on this small region. The enormous reserves of oil and natural gas are also the main reason behind the constant conflicts in this region, but also the main reason why lot of effort is put to control and stop this conflicts.
