Political and economic helped both of their parties to gain support
The answer is 30 cm cubed
The Mongolian empire influenced the development of Russian culture and economics. The mongols expected the Russians to pay tribute for holding their own kingdom. it destroyed Russia's economy was affected them to trade with others and puts them in isolation with the rest of the world. So the Russians turned to the east, in language, the arts,and religion. During the golden Horde Islamic and Muslim culture and religion was an influence.
D. Return of the republicans is your answer.