The Use of Malarial Fever to Treat Paresis

The use of malarial fever to treat paresis

A) was the first time scientists used knowledge of brain chemistry to develop specific drugs for treating mental disorder.
B) proved to be so ineffectual, many professionals abandoned the biological explanation of mental disorders.
C) is an example of the barbaric treatment that mental patients received at the beginning of the Twentieth Century.
D) represented the first clear-cut defeat of a mental disorder by medicine.