How did europe change after napoleon was defeated?

a)the french revolution spread to other countries.
b)france was reduced to half its original size.
c)many monarchies were restored.
d)britain and prussia became less powerful.

Europe change after Napoleon was defeated by restoring many monarchies.

After the defeat of Napoleon, the period opened with the Congress of Vienna as a peace settlement.Many Old Regimes survived the French Revolution and Napoleon in Europe. Monarchs still held the reins of political power. Aristocrats in Europe grasped their hold on the army and administration and enjoyed privileges.To enforce authority, the conservative nobility resorted to the secret police and armed force.

Thus we can conclude that Europe change after Napoleon was defeated by restoring monarchies.

Thus option C. is correct answer.

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C. congress was able to pay debts run up in the war