Answer:
Option C, prohibition child labor
Explanation:
Florence Kelley was a social reformer. She was sensitive towards the condition of children working in the factories and industries since her childhood as her father used to tell her the plight of these child labors. In 1891, she visited the Hull House settlement and found that even children of 3 to 4 years were working in shops. She surveyed the entire area and published the report. This report was further presented to the state after which Illinois State Legislature prohibited the employment of children below the age of 14.
Hence option C is correct.
