The Cold War was the war between United States and Soviet Union following the WWII. After the defeat of the axis powers and the fall of Hilter, the Soviet Union possessed the world's largest enemy. The US possessed the most powerful weapon in the atomic bomb, which had just been dropped on Hiroshima and Nagasaki to defeat Japan. Both nations had allied with one another in the war to defeat their common enemy but this was merely a front to mask the contempt both had for one another. The cold war was the term used to describe the antagonism between democratic America and communist Soviet Union (Russia). While there was never any armed notion of conflict between both nation, the cold war was the battle of ideologies and was waged in nations all over the world between proxy nation. The US goal was to spread democragy throughout the world and Soviet Union's goal was to spread communism.
The correct answer is - E.) to increase national sovereignty.
By cooperation on regional or global level the states do not, and can not really do anything about increasing the national sovereignty. The reason for that is that the national sovereignty is the matter of the state itself, its politics, policies, and handling of the situations in the country. The other countries with whom the state cooperates have nothing to do with it, nor it is their place to interfere in the national sovereignty of the other states, be it friendly states or not.
Answer:
drugs capable of influencing perception, mood, cognition, or behavior