Sparta, try watching horrible histories. They make the information stick in your head. Look it up on Youtube.
Iran, it was called the Iran Hostage crisis.
I would think B
I would get a second source on this though
The Cold War greatly "polarized" <span>postwar international relations in that it led to two competing spheres of influence: the US in the west with capitalism, and the USSR in the East with communism. </span>