The correct option is C Russian
In the decades after it was established, the Russian-dominated Soviet Union grew into one of the worlds most powerful and influential states and eventually encompassed 15 republics viz Russia, Ukraine, Georgia, Belorussia, Uzbekistan, Armenia, Azerbaijan, Kazakhstan, Kyrgyzstan, Moldova, Turkmenistan, Tajikistan, Latvia, Lithuania, and Estonia. In 1991, the Soviet Union was dissolved following the collapse of its communist government. With this ended the long period of Cold War and the constant threat of a catastrophic World War.