Concept: The League of Nations had only a few Secretaries-General; one of them was Joseph Avenol.Explanation:Joseph Avenol was a French diplomat.He served as Secretary-General of the League of Nations.He held the office in the years before World War II.He succeeded the first Secretary-General, Sir Eric Drummond.The other listed names served in the United Nations, not the League of Nations.Answer: A. Joseph Avenol