I think the answer is germany (A)
Answer:
Due to weak economy and heavy loss in the war.
Explanation:
The Bolshevik takeover Russian government in October 1917 because the people thought that the Nicholas II is not fit to rule over the country. There are two main reason for this revolution i.e. widespread inflation and food shortages in Russia and heavy losses that the Russians suffered during World War I due to inadequate supplies of weapons and logistics. At that time Nicholas II was the emperor of the country so all the blame came on him and the people viewed him as weak and unfit to rule over the Russia.
