Answer is: <span>League of Nations.
League of Nations was formed at the end of WWI (10 January 1920) a result of the Paris Peace Conference. League of Nations was first international institution whose mission was to maintain world peace. At 1935 it has 58 members (states). The League of Nations endured for 26 years.</span>
C- colonization era
Constitution era obviously isnt it
Reform era was known as the progressive era
the early republic era had to with transfer of govt
thus leaving colonization era as the last option
As he could explore the real world and develop good social skills
Answer:
The period of Europe's history relating to the Middle Ages.
hope it helps!