Which event sparked the beginning of World War I in Europe?

assassination of Archduke Franz Ferdinand

the sinking by the Germans of the Lusitania

Germany’s invasion of Poland

Japan’s bombing of Pearl Harbor
A?

5 answers

Yes, A.
thank you you guys are a real big help=}
You are very welcome. :-)
Thank you :)
Alright, yes, thank you for being kind and helping others. But I'm asking you kindly to please stop impersonating Ms. Sue.