How did the Congress of Vienna affect power and authority in European countries after Napoleon’s defeat? Please give me at least 5 sentences explain why

Congress of Vienna reestablished the strong system of monarchies, that was supported by the creation of Holy Alliance. Its goal was to prevent any conflicts that would deprive the authority of strong monarchies. The strongest role in that process was in the hands of Austria and Russia. They wanted to prevented further revolutions on the European soil. Once more, these countries became leaders, who were suppressing any form of changes in the country.

Explanation:

The strongest role in this process was in the hands of Austrian prime minister Metternich. He was the architect of new system. This system lasted for a certain period of time, until the Revolution of 1848.

answer; i do believe its (b) 12.5 years of age;