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.
