(A) 10
(B) 30
(C) ** 60
(D) 100
EXPLANATIONS BELOW
Concept note-1: -Forty-two countries joined the League at the start. By the 1930s about 60 countries had signed the 26 promises of the Covenant – notably Article 10, in which nations promised to keep the peace and help nations which were attacked.
Concept note-2: -At its greatest extent from 28 September 1934 to 23 February 1935, it had 58 members. After some notable successes and some early failures in the 1920s, the League ultimately proved incapable of preventing aggression by the Axis powers in the 1930s.
Concept note-3: -The League of Nations officially came into existence on 10 January 1920. On 15 November 1920, 41 members states gathered in Geneva for the opening of the first session of the Assembly.
Concept note-4: -In the 1930s, the world economic depression encouraged nations to be more aggressive towards each other. Fascist dictatorships took power in Germany, Italy and Japan, which were intent on empire-building and these countries defied the League. Japan conquered Manchuria in 1932. The League objected, but could do nothing.
Concept note-5: -In the 1930s, it failed terribly. By 1935 most countries did not think that the League could keep the peace. When Hitler began to break the Treaty of Versailles in the 1930s, the League was powerless to stop him, the league failed, and the only way to stop Hitler was a Second World War.