What assessment findings mark the prodromal stage of schizophrenia?

A. Stereotyped behavior, echopraxia, echolalia, and waxy flexibility are characteristic of the catatonic stage of schizophrenia, not the prodromal stage. B. Auditory hallucinations, ideas of reference, thought insertion, and broadcasting are positive symptoms that typically emerge during the active stage of schizophrenia. C. Loose associations, concrete thinking, and neologisms also represent active-phase symptoms and are not typical in the prodromal stage. D. The prodromal stage is marked by subtle changes in behavior and cognition, including social withdrawal, misinterpretation of events, poor concentration, and preoccupation with unusual thoughts or religion. These signs precede the onset of full-blown psychotic symptoms.