A <span>constituent is </span>a member of a group represented by an elected official.
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>
By this quote he was trying to tell that the issue of peace is everyone’s concern. It is their duty to help others if they expect the same kind of help in the future.
The answer is C. mass production.