The answer is B, if this is about WW1. The allied powers was WW2 and involved The U.S. The Western advance was Britain and France in WW1, I think... Don't quote me on that. And the League of NAtions was the precursor of the UN and was started in between WW1 and WW2 and lasted through WW2. But based on the nations listed, since it is only Russia, Britain and France, The answer would be B. Triple Entente.
The Iranian hostage crisis
<span>In the spoils system political appointments or jobs in the civil service are granted by the Victor of an election or vote. The victor normally gives position an power to his friends, family or political allies who helped him or her win the election as a reward and incentive for working for the party.</span>
I believe the answer is: It delayed or extended nationalist struggles.
The nationalist struggles come after different nations started to fully embodied nationalist movement, which make them tend to incline to prove their nation's superiority over another nations. This type of thinking often lead to conflicts among these european nations.