Answer
3. Not sure what the question is asking.
4. Not sure what the question is asking.
5. Austria-Hungary annexed Bosnia-Herzegovina in 1908.
6. Gavrilo Princip assassinated Archduke Franz Ferdinand and his wife the Archduchess Sofia.
7. Nationalism.
8. Arms race.
9. The three countries in the Triple Entente were France, Russia, and the United Kingdom.
10. Not sure what the question is asking.
11. The three countries in the Triple Alliance were Germany, Austria-Hungary, and Italy.