How did the League of Nations respond to Italy's invasion of Abyssinia? Why wasn't it effective?
a) Imposed economic sanctions; Ineffectiveness - lack of support from major powers

b) Military intervention; Ineffectiveness - League members' refusal to commit troops

c) Diplomatic protests; Ineffectiveness - League members' lack of unity and resolve

d) No response; Ineffectiveness - League's inability to enforce its decisions