A.) all of the others are true, the crime rate actually went up due to bootleggers and speak easies and others who illegal made and sold alcohol
In both wars, the governments of the world had to try to fix the what had been destroyed.
America, on the other hand, had little to no damage in ww1 but had plenty in ww2. They spent most of the time after ww1 partying and making the stock market crash. While after ww2, they tried to get communism out of the new countries.
The United States rejected the Treaty of Versailles and negotiated its own peace agreement or agreement to end the war with Germany in 1921. The Senate would not vote to pass the Treaty of Versailles and instead sought to create a treaty or agreement solely based upon American terms.