Deonna1987 Deonna1987 17-04-2019 History contestada Which of these is an example of economic transformation that occurred in the early 20th century? A) The United States helped negotiate a peace agreement between Japan and Russia. B) The United States increased its size drastically by purchasing the territory of Alaska from Russia. C) President Lyndon B. Johnson supported a “flexible defense” strategy in response to perceived communist threats. D) President Taft instituted the practice of “dollar diplomacy” through fin