If you answer god will be happy

A

Explanation:

Emancipation of Russian Serfs

It was the reign of Czar Alexander II, when one of the most important emancipation took place, providing freedom to all Russian serfs. With this emancipation, around 23 Million people received their liberty.

The idea of Russian Serfs' liberation was actually a part of the reformation of Europe, development of industrial fields and transforming the serfs into free proprietors who could help uplifting the stature of the country with their business and also provide economical support to the army.

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.