The answer is A. I believe this is correct
Answer:
Serbia
Explanation:
Austria-Hungary declares war on Serbia. On July 28, 1914, one month to the day after Archduke Franz Ferdinand of Austria and his wife were killed by a Serbian nationalist in Sarajevo, Austria-Hungary declares war on Serbia, effectively beginning the First World War
They are more commonly known as the bill of rights.
Propaganda, they inspired more people to join the fight on America's side.