To avoid another German attack on the Russians, to create a buffer zone between the soviet union and the west, and to supply materials in order to rebuild the soviet economy
France was upset with Great Britain because of the war they just had, so they joined America. The Revolutionary War was fought between Great Britain and America.
Answer: Method of Agreement
Explanation:
In method of agreement,
there's comparison between two or more effects/events in different circumstances to know what they have in common. With this, the researcher would be able to eliminate all variables that are not needed for occurrence of the phenomenon.
He made his own way of it, it is called Leninism
Leninism is a political theory developed by Russian revolutionary Vladimir Lenin that proposes the establishment of the dictatorship of the proletariat, led by a revolutionary vanguard party, as the political prelude to the establishment of socialism.