(A) ** Verbal discussions and warnings
(B) ** Economic sanctions
(C) Military invasion
(D) ** Trade embargoes
EXPLANATIONS BELOW
Concept note-1: -Members of the League of Nations were required to respect the territorial integrity and sovereignty of all other nation-states and to disavow the use or threat of military force as a means of resolving international conflicts.
Concept note-2: -In addition to territorial disputes, the League also tried to intervene in other conflicts between and within nations. Among its successes were its fight against the international trade in opium and sexual slavery and its work to alleviate the plight of refugees, particularly in Turkey in the period up to 1926.
Concept note-3: -The only way to avoid a repetition of such a disaster, was to create an international body whose sole purpose was to maintain world peace and which would sort out international disputes as and when they occurred. This would be the task of the League of Nations.
Concept note-4: -The League eventually disbanded on April 20th, 1946. The League of Nations undertook several missions to promote peace and resolve conflicts but was only partly successful. The Geneva Convention was devised under this league in the 1920s with the aim of preventing chemical and biological weapons.