"this 1852 drawing most likely would have been used to argue for improvements in
(1)workhouse rules
(2)sanitation regulations
(3)factory conditions
(4)suffrage laws
"

the answer is (2)sanitation regulations

explanation:

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.