I'd say (B) but I'm not completely sure.
The Cold War, a "war" of attrition and nuclear build-up between the United States and the Soviet Union, greatly shaped American culture by the people's emphasis on space and science to beat out the Soviets.
The economical boost of selling of cotton lead to the cotton gin being created during this period of time. Unfortunately, more cotton being produced meant more slaves being needed.
Power and wealth fueled warfare in Feudal Japan, <span>Feudal estates sent knights to the Holy Land in the Crusades for religious reasons.</span>