In the early 1900s, after the Bolsheviks began to rule Russia,
the tsar and his family left Russia for Germany.
the fight for power resulted in a three-year civil war.
the Treaty of Brest-Litovsk was no longer honored.
the White Army declared support for the Bolsheviks.

B, the fight for power resulted in a three-year civil war.

Explanation:

The Tsar and his family were executed, never left for Germany.

The Treaty of Brest-Litovsk was no longer valid after the Central Powers surrendered in 1918.

The White Army was a anti-bolshevik military dictatorship.

So that leaves B.

answer; taking up arms to defend the nation;

d and a is the correct anwsers

explanation: