C. A rise in the Birthrate. Helllooo Baby boom sound familiar?? During the Post-war a new generation rose and started to change the culture and ways of how American citizens acted because they have never been through war. (btw that's us :P)
The baby boomer, is a term emerged after the Second World War, to define the demographic phenomenon during the period between 1946 and 1964, and characterized by a significant increase in the birth rate. The members of that generation are known as baby boomers.