Which of the following did not serve as a long-term cause of WW II:
a. Hitler's anger over the provisions of the Treaty of Versailles
b. Germany reclaiming lands and territories it had lost as a result of WWI
C. Nations of Europe following a policy of appeasement during the 1930s and at the Munich Conference
d. The spirit of Pan-Slavism that active in the region of the Balkan Peninsula
