I think the answer is letter <span>B. Democracy spread, and the United States became the world’s sole superpower
The fall of USSR had allowed democracy and independence amongst the countries that were under the USSR. Gorbachev unknowingly gave people the right to express themselves. With USSR down, the US was able to stop the cold war and become a superpower.
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The answer to the blank space given in the question is self-regulation.
Self-regulation in this context means that as individuals in a civil society, a person should follow standards accepted by a nongovernmental entity despite not having the threat of a punishment if she or he chose to not follow the rule. Since nongovernmental entities do not have the same power as a government, an individual’s self-regulation would determine whether a person would abide by the standards set or not.
The restriction of the arbitrary exercise of power by subordinating it to well-defined and established laws.