Answer:
On June 28, 1914, a Bosnian Serb assassinated Archduke Franz Ferdinand during his visit to Sarajevo.
Explanation:
(Brainliest plz?)
World war three is the answer
<span>Assuming that this is referring to the same list of options that was posted before with this question, the best option would be that the US waited for approval from world leaders before retaliating, since instead the US took a unilateral approach. </span>
