Answer:
A. The fall of eastern empires shifted the balance of power toward Western Europe.
Step-by-step explanation:
World War I led to significant changes in the balance of power in Europe. The war resulted in the collapse of several major empires, including the German, Austro-Hungarian, Russian, and Ottoman empires. These empires were located in Eastern Europe and the Middle East.
The collapse of these empires created power vacuums in the regions they once controlled, which shifted the balance of power toward Western Europe. Western European countries, particularly France and Britain, emerged as major powers in the aftermath of the war. They gained control over former territories of the defeated empires through the establishment of mandates and other mechanisms.