The Research Findings with Regard to Heinrichs and Awad's (1993)subtypes

The research findings with regard to Heinrichs and Awad's (1993) subtypes of schizophrenics found that:

A) The subtypes were similar in terms of length of illness and extent of hospitalization.
B) The neurocognitive differences between the groups became less distinct over time (i.e., were less apparent at follow-up) .
C) There were no apparent symptom differences among the subtypes.
D) All of the above.