The correct options are
B Rise of Nazism
C Failure of League of Nations
Failure of League of Nations- The League of Nations was created after after the First World War to prevent future wars. However, the League suffered an early blow when the USA did not join the League. Even those who joined the League were not interested in the principle of collective security.
Rise of Nazism- The rise of extreme nationalism in Italy and Germany in the form of Fascism and Nazism, respectively contributed to the causes which led to the Second World War.