The Postwar Economy: 1945-1960. As the Cold Warunfolded in the decade and a half after World War II, the United States experienced phenomenal economic growth. The war brought the return of prosperity, and in the postwar period the United States consolidated its position as the world's richest country.
American Post-Civil War inflation, the demonetization of silver in Germany and the US, and a large trade deficit were all factors. If it wants the main cause, I'd probably say the demonetization of silver.
"C. <span>Muslims finally defeated the Christian crusaders and retained control of the Holy Land" is the best option from the list since this happened but only for a short time. </span>