The correct answer is D) A baby boom that increased the US population.
After World War II ended, many American soldiers returned home to their wives. During this peacetime economy when soldiers were helped financially thanks to the GI Bill, many of them looked to start families. This is what resulted in the baby boom. The baby boom generation is considered anyone born between 1946-164. In the 1950's alone, American couples added more than 50 million babies to America's population.