4x 1931-Japan invades Manchuria. 1935- Italy invades Ethiopia. 1936- Germany militarizes the Rhineland. 1938- Hitler agrees to stop expansion at the Munich Conference. Based on this chart it is evident that a major cause of World War II was A the failed economic policies during the Great Depression. B the warlike attitude of countries in the Pacific Ocean region. C the failure of the League of Nations to stop the aggressive behaviors of some countries. D the reluctance of European countries to look outside of their borders after World War I.