Which event sparked the beginning of World War I? 1. the murder of Archduke Franz Ferdinand
2. the overthrow of Germany's tsar
3. the Russian Revolution
4. when Joseph Stalin became dictator of the Soviet Union

1. the murder of Archduke Franz Ferdinand

Explanation:

earliest event of choices provided that can be said to have sparked the beginning of World War I, and often considered to be the primary one

answer; the correct answer to the above statement is world trade center towers were build///110 story north tower of the original world trade center was