The mandate system after world war one was condemned by the league of nations. So, Correct option is option B.
After the end of World War I in 1918, the newly formed League of Nations, the predecessor of today's United Nations, created a system of mandates. The League of Nations was founded on the idea of collective security, the concept that nations ensure their own security by working together to ensure the security of all nations. At the time, this was a novel approach to international governance. Class of the Delegation System The League of Nations has created her three classes of delegations under Article 22 of the Charter of the League of Nations:
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