The reform efforts of Dorothea Dix during the mid-nineteenth century led to option D: improved facilities for the mentally ill and disabled.
Dorothea Dix was a famous U.S. advocate for the mentally ill. She lobbied state legislatures and the federal government to create the first mental asylums.
Dorothea Dix founded more than 30 hospitals within a period of 15 years. She did this and educated people about mental illnesses and the possibility if recovery for most patients.
Therefore, correct option is D.
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