Answer:
C. The assassination of Archduke Franz Ferdinand in Sarajevo
Explanation:
As this assassination was done in Serbian territory, the Austrian-Hungarian government was extremely angered and used this event to bring Serbia into a fold. Obviously, Serbia did not accept the terms of Austria-Hungary and instead became allies with the Russian Empire.
Slavic and Scandinavian countries are very rich in resources, and Russia wanted to control most trade in Europe until the collapse of the Soviet Union. More trade = More power and they were still recovering after the HARD losses when the Germans' invaded Leningrad and the war.
Yes, that's in fact true.
Answer: Vertical integration is firm taking control of and producing its inputs and outputs rather than using the market.
Example: A vertically integrated produce company, for example, might hold a farm, a produce distribution business, and a green grocery.
President Abraham Lincoln removed General George B. McClellan for his ineffective leadership. General McClellan had led the Potomac Army.
Hope this helps! :)