Austria-hungary took issue with serbia over the death of archduke franz ferdinand because he was from

a. austria
b. germany
c. hungary
d. russia

A. Austria.

Explanation:

Archduke Franz Ferdinand of Austria was a member of the royal imperial family of Austria, a likely heir to the throne.

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.