What was lenin's solution to russian participation in world war i? a. he implemented a trench warfare strategy, which caused the german advance to stop. b. he successfully achieved a significant role at the versailles peace negotiations. c. he launched a massive offensive campaign that carried russian forces deep within germany. d. he negotiated a peace treaty with the germans and surrendered huge amounts of land on russia's western border. e. he immediately demanded that his british and french allies send humanitarian, economic, and military aid to the eastern front?