After growing up in Georgia, Stalin became a political activist, conducting discreet activities for the Bolshevik Party for twelve years before the Russian Revolution in 1917. ... Following the October Revolution, Stalin took military positions in the Russian Civil War and the Polish-Soviet War.
The battle of Stalingrad took place in Volgograd, Soviet Union
Answer is D
I think it was near Pennsylvania
Mongolia was a part of China in 1900.
I believe the answer is B only because suffrage means to vote. But it could also include D so I'm not 100% sure.