Answer:
The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. In June 1914, a Serbian-nationalist terrorist group called the Black Hand sent groups to assassinate the Archduke.
Equilibrium quantity is simultaneously equal to both the quantity demanded and quantity supplied. In a market graph, the equilibrium quantity is found at the intersection of the demand curve and the supply curve. Equilibrium quantity is one of two equilibrium variables. The other is equilibrium price.
There are two interpretations of this:
1) It was a "gift" to Ukraine, marking the amicable relations between Ukraine and the Soviet Union, to bring them even closer
2) It made the Ukrainian Soviet Socialist Republic more ethnically Russian; which would shift the dynamics in it and tie it even closer to Soviet Union (And for example make it less likely that it would try to split )
The U.K.'s <span>Prime Minister Theresa May</span>