What were the only two Allied European countries that Germany could not conquer in its aggressive blitzkrieg advance?
The UK and Sweden
Switzerland and Spain
France and the USSR
The UK and the USSR

One of the things that allowed native americans in mexico to settle cities larger than those in areas to the north was "b. the development of cities that were built by an earlier civilizations," since mexico had been the home of some of the world's most advanced civilizations before the columbian invasion

Since most of the industry is in the north the protective tariffs would mostly benefit the north and since the south depends on its exports of cotton the protective tariff would hurt the south