Answer: announce officially or publicly
B
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The correct answer here would be B - adoption of cultural characterstics of the conquerors by the vanquished.
However, this was not neccessarily the case always as sometimes those who conquered could adopt some characteristics of those they conquered. However, in general, B would be the correct answer.
Answer:
it removed Russia from the war and brought about the transformation of the Russian empire into the union of Soviet socialist republics.
The second one, Bolsheviks and anti-tsarists