The DSM-IV-TR Classifies the Learning Disorders by Academic Subject Because

The DSM-IV-TR classifies the learning disorders by academic subject because

A) it has been shown that academic functioning domains correspond to independent functional modules.
B) learning disorder diagnoses are based upon an IQ / achievement discrepancy and described by the domain in which they occur.
C) mathematics disorder stems from a well understood set of impairments that typically do not impact achievement in other domains.
D) reading corresponds to deficits in input; mathematics to processing; and written expression to output issues.
E) at the time of publication, there was insufficient research evidence to do otherwise.