The correct answer is:
Restricting child labor to children over 12 years of age.
Eugene Debs (1855 – 1926) was an American political activist, socialist and founder members of the Industrial Workers of the World (IWW). Through his five presidential candidacies for the Socialist Party, Debs would become one of the best-known socialists in the US. Debs was an advocate of legislative restrictions on child labor.