What was the "spark" that set off world war i?

assassination of Australia archduke Frantz Ferdinand in Sarajevo on June 28 1914 the assination was carried out on two occasions on the same day

Explanation:

the quote by walter cronkite contributes to the central idea of the text by supporting the central idea. cronkite argues that what is deemed “right” for and in america may not be good for other countries. this supports the central idea of the text, that the vietnam war was unpopular in america for multiple reasons- including cronkite’s.

battle of the bulge, but are there any multiple choice options?