The correct answer is C) an effort to establish a balance of power.
The other options of the question were A) the aggressiveness of dictators. B) the rivalry between France, Germany, and Greece. D) the concept of mercantilism.
The Congress of Vienna redraws the map of Europe. Triple Entente is formed to combat the Triple Alliance. Treaty of Versailles calls for the creation of the League of Nations.
These actions were part of European decisions to bring new order and a balance of power in the political arena of the continent after so much turmoil and conflict. The Congress of Viena was held to provide peace in western Europe after all the consequences of the Napoleonic Wars and the French wars. Years later, on the brink of Worl War 1, the Triple Entente formed by Great Britain, France, and the Soviet Union fought the Triple Alliance formed by Germany, Austria-Hungary, and Italy. Another important step through peace after World War 1 ended was the agreements during the Treaty of Versailles, France, that end up in the creation of the international organization called the League of Nations.