Answer:
C. ( Colombian Exchange )
As Europeans traversed the Atlantic, they brought with them plants, animals, and diseases that changed lives and landscapes on both sides of the ocean. These two-way exchanges between the Americas and Europe/Africa are known collectively as the Columbian Exchange.
The Central Powers consisted of Austria-Hungary, Germany, Bulgaria, and the Ottoman Empire.
The Alliance Powers consisted of Serbia, Russia, France, the United Kingdom, Italy, Belgium, and the United States.
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