What group of people are responsible for setting up the Grand Princes of Russia and creating their bureaucracy, leading to Russia becoming a
nation?
1 Viking
2 Mongol
3 Slavs

D: Slaves and Vikings

D Explanation

Slaves were basically the people whose descendants are Russian, Belarusian, Serbian, and more.

After Ivan the Great drove off the Mongols, the Slavs in Kiev, today the capital of Ukraine, asked the Vikings to rule them since they proved they couldn't do it themselves.

A Explanation:

Celts were polytheist people in Ireland, which is nowhere close at all to Russia

B Explanation:

Where's the Slaves?

C Explanation:

Again... Where's the Slaves

Hopefully this helped, if not HMU and I will try my best o get you a better answer! :)

lewis and clark (i think)

i think its provide for the common defense