How Was the Cold War System of Power Different from the Post-Cold

How was the Cold War system of power different from the post-Cold War system of power?

A) In the Cold War system of power, both countries tried to balance their power, where as in the post-Cold War system, there was a distribution of power among many countries.
B) In the Cold War system of power, there was hegemony , where as in the post-Cold War system , countries tried to balance their power .
C) In the Cold War system of power, both countries emphasized a zero - sum game, where as in the post-Cold War , there was hegemony .
D) In the post-Cold War of power there were " superpowers ," but in the Cold War , there were " great powers ."
E) Both systems of power emphasized a balance of power, but only the Cold War era was successful .