Respuesta :
The Collapse of USSR in 1991 was the most significant event that ended the cold war.
What is a "Cold War"?
A "Cold War" is a conflict between nations that doesn't result in a direct official declaration of war. The tactics used in the Cold War dismantle economic and political stability. Often, proxy wars are also used in the Cold War.
Hence, the Cold War ended with the collapse of the USSR, so Option C is correct.
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