The adoption of the Cyrillic alphabet in Kiev, and the state's adoption of Eastern Orthodoxy, were results of its close relationship with a. The Holy Roman Empire.
b. The Byzantine Empire.
c. The Grand Duchy of Moscow.
d. The Golden Horde.

B - Byzantine Empire

Explanation:

I say this because that was during the time of said alphabet.

to reform the distraught soviet union, the democratization of the communist party was promoted through party secretary mikhail gorbachev's policies of “perestroika” and “glasnost.” perestroika refers to the reconstruction of the political and economic system established by the communist party.

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