The Rationale for Shocking the Brains of Mental Patients to Produce

The rationale for shocking the brains of mental patients to produce a seizure was that

A) psychiatric patients show abnormal electrical activity of the cortex.
B) painful shock made the patients more manageable.
C) the occurrence of a brain seizure appeared to reduce symptoms in psychiatric patients.
D) large doses of insulin had been shown to normalize brain activity.
E) such treatments curbed inappropriate behavior.