(A) Collective Security
(B) Disarmament
(C) World Peace
(D) ** Collective Stability
EXPLANATIONS BELOW
Concept note-1: -The main aims of the organisation included disarmament, preventing war through collective security, settling disputes between countries through negotiation and diplomacy, and improving global welfare.
Concept note-2: -Despite formulating the concept and signing the Covenant, the United States never joined the League of Nations, and some relatively-isolated sovereign states in Asia also did not join, including Saudi Arabia, Yemen, Mongolia, Nepal, and Bhutan.
Concept note-3: -Many historians believe that if America had joined the League, there would have been a lot more support in preventing conflicts. Other major powers such as Germany and the Soviet Union were not allowed to join.
Concept note-4: -Aims of the League of Nations To ensure disarmament, war prevention through collective security. It also focus on international conflict resolution through conversation and diplomacy, and global wellbeing.