In the 1870s, began to investigate factory conditions.

A. new York

B. pennsylvania

C. massachusetts

D. new jersey

The correct answer to this question is C.

C. Masachusetts. In 1870, The Bureau of Statistics and Labor in Massachusetts was the earliest and pace-setting organization among the nations. Their first yearly report in 1870 give a detailed accidents involving children working in a factory just like paper mills and textile mills and other big establishments. They sent investigators to all employers to notice surroundings and circumstances first-hand.