Which Statement Best Describes the Relationship Between Schizophrenia and Socioeconomic

Which statement best describes the relationship between schizophrenia and socioeconomic level?

A) There is no consistent relationship between schizophrenia and socioeconomic level.
B) Schizophrenia is most common at the lower socioeconomic levels.
C) Severe forms of the disorder are most common at the upper socioeconomic level; milder forms are more common at the lower socioeconomic levels.
D) Schizophrenia is most common at the upper socioeconomic level.