B. Soviets blocked land routes to western Germany
The Manifest destiny was the idealogy that North America was our god given right. The effect was that this lead to the Mexican American war
In general, "a. cities" are not required for the development of civilization, since many civilizations throughout history have been comprised of smaller villages that would not compare to modern or pre-modern cities.
Once The United States Entered The War, Foreign And Domestic Policy Changed. It Had A Great Impact On Our Economy, The Attack On Pearl Harbor, Isolationism, Hitler Declaring War On The USA.
America did not enter war until Japan attacked Pearl Harbor