C and D are the best answers out of the bunch
I believe theories that has been proved and widely accepted and confirmed by other group of people is a law
Russia in the late 19th / early 20th century was a massive empire, stretching from Poland to the Pacific, and home in 1914 to 165 million people of many languages religions and cultures. Ruling such a massive state was difficult, and the problems within Russia produced a revolution in 1917<span>. which swept the old system away. Several key fault lines can be identified as long term causes, while the short term trigger is clearly </span>World War 1.
Confederacy:
- Much more experienced leaders (towards the beginning of the war)
Union:
- Larger army
- much more industrialized
- had more goals to fight for than the Confederates
etc
etc
hope this helps
C because I said so why question it