Answer:
The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. ... When Russia began to mobilize due to its alliance with Serbia, Germany declared war on Russia.
Explanation:
It's B. The Columbian Exchange is just that, the exchange of goods, plants, people, etc. between Europe and the Americas
Https://msu.edu/course/iss/310/snapshot.afs/machemer/ss03/italian.shtml
Here's the link for the Italian Renaissance Outline