What were lenin's main concern about joseph stalin?

Lenin believed Stalin had "concentrated enormous power in his hands" and was not sure "he always knows how to use that power with sufficient caution"

c, because the american revolution was from 1765 to 1783.

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.