Aside from having mental illnesses, what difficulty did the people in dix's examples have in common that affected how they were treated? poverty wealth physical strength

The right answer is poverty. After visiting and working in prisons, asylums and almshouses, among others, Dorothea Dix witnessed that people with mental illnesses that were confined in those places, and treated badly, were also very poor. In fact, in 1854 she even presented before Congress a Bill for the Benefit of the Indigent Insane, which proposed the provision of federal land and funds for the creation of new mental institutions.  

Its A I hope this helps ;)

the correct answer is b