How was Russia's role in the events leading to World War I different from that of Austria -Hungary ? A. Russia was a member of the Triple Entente, while Austria-Hungary was a member of the Triple Alliance. B. Russia engaged in trench warfare, while Austria-Hungary refused to engage in any nontraditional tactics. C. Russia entered the war at the beginning, while Austria-Hungary entered several years later. D. Russia used modern weaponry , while Austria - Hungary's weaponry was centuries out of date.