________ was a class of drugs discovered in the twentieth century that reduced hallucinations and delusions and made it possible for many people who had been institutionalized for years to be released from asylums and hospitals.

A) Gentamycin
B) Diethylstilbestrol
C) Roxatidine
D) Phenothiazines

Phenothiazines were discovered in the twentieth century and are a class of drugs commonly used to treat mental illnesses such as schizophrenia. They reduce hallucinations and delusions, making it possible for many people who had been institutionalized for years to be released from asylums and hospitals.