I would say B) and D) apply to some of the differences between a Prime Minister and a President and also A). In addition, a Prime Minister is head of the government but may not be head of the state which may be a President in the same country or perhaps a Governor General.
you would hve to explai moe of this quesion
The berlin conference was organized by Otto von Bismarck (the first chancellor of Germany)
It was during the Cold War era that two economic philosophies were predominant: Capitalism and communism--with the United States advocating for the former and the USSR advocating for the latter.
