Cases of schizophrenia:

A) result from erratic, cold, rejecting mothers.
B) vary in severity, duration, and prognosis.
C) occur from living in an unpredictable environment.
D) are seldom associated with biological factors.

Schizophrenia cases vary in severity, duration, and prognosis. While environmental factors may play a role, there is significant evidence pointing to biological factors contributing to the development of the disorder. The idea that erratic, cold, or rejecting mothers cause schizophrenia has been largely discredited.