In the Late 1800s, the Emphasis on a Biological Cause

In the late 1800s, the emphasis on a biological cause of mental disorder ironically resulted in reduced interest in treatments for mental patients because it was thought that

A) physicians should devote more time to the physically ill.
B) patients would improve more rapidly if they were not hospitalised.
C) hospital staff were not adequately trained to administer new treatments.
D) mental illness due to brain pathology was incurable.