Answer: these web sites will help you!
https://www.unrv.com/economy.php
https://www.dcs.k12.oh.us/cms/lib/OH16000212/Centricity/Domain/293/Rome_Enrichment.htm
The Russian Empire was compromised of a vast amount of lands, so subsequently there are dozens of different ethnicity's across it including the Bashkirs, Yakuts, Nogais, and etc.
The framers of the Constitution prevented tyranny separating the powers of the government, creating the system known as check and balances, where each power excercises control of the other two. All this avoids the concentration of power.
I’m pretty sure the answer is D