As Recently as the 1990s, What Was the Predominant Belief

As recently as the 1990s, what was the predominant belief regarding the sources of the primary threat in international politics?

A) That major threats to international peace stem from competing regional alliances
B) That major threats to international peace stem from terrorist groups
C) That major threats to international peace stem from states
D) That major threats to international peace are rooted in greed