According to the document what law was commonly broken by tenement workers

According to the document young children below the minimum age are made to work under unsanitary conditions.

Explanation:

Tenement is generally an overcrowded apartment house that is mainly found in the poor section of a city. These large apartment buildings in the city are known for their overcrowded and unsafe conditions. Tenement workers usually work for long time in unsanitary conditions. Tenement workers were made to work in the rooms occupied by the persons suffering from contagious and infectious diseases like scarlet fever, diphtheria, measles, typhoid, and tuberculosis. Kids are made to work until 8'o clock in the evening.