Answer:
The answer is Letter C. Hope this is right.
Explanation:
please mark this as brainliest if this is correct. :) thx
"Austria-Hungary<span> declared war on </span>Serbia<span> after serbian nationalists assassinated Archduke Franz Ferdinand and his wife, this was not necessary as only a few serbians participated and these assassinations usually did not result in war" (prezi.com)</span>