Respuesta :
B) Yeltsin was the head of the KGB, the secret police force that the Communists used to silence opponents
The correct answer is C) Yeltsin led the Russian Congress that declared Russian sovereignty over its own territory in June 1990.
The statement that BEST describes the role of Boris Yeltsin in the breakup of the Soviet Union is "Yeltsin led the Russian Congress that declared Russian sovereignty over its own territory in June 1990.
After Mikhail Gorbachev, Boris Yeltsin became President of Russia in 1991. The Soviet Union was dissolved in December 1991. Yeltsin had dissolved the Communist Party in August of the same year after denouncing a coup against Gorbachev. That is when the 15 soviet Republics started to declare its independence. That represented the end of the Soviet Union.