Pretty much full religious freedom, as long the subjects worshipped Roman Gods. Jews were excused from worshipping Roman Gods.
No, it is not true that the development of armies, navies, and weapons is called imperialism. This would be called "nationalism". Imperialism refers to when countries take over and dominate other countries.
The Zollverein was an economic union of 30 states. The correct option among all the options given in the question is option "b". Zollverein is actually a coalition of German states whose main agenda was to manage the tariffs and all the economic policies within the German territories. Later on it expanded to other European countries as well.
Camp David Accords
Famous diplomatic agreement helped President Carter
