Why did car ownership rise in the postwar years

In the years following World War II, car ownership rates rose in America due to the reduced costs of automobiles.  During World War II, American industry was greatly advanced due to the proliferation of automobile construction factories built to accommodate the industrial and automobile production needs for the war effort. After the war, these factories - and the readily available resources - caused automobile costs to drop drastically.  

If this is a true or false question i would say true