Ahmed Is a Three-Year-Old Boy Recently Diagnosed with Autistic Disorder

Ahmed is a three-year-old boy recently diagnosed with autistic disorder.He appears completely unresponsive to his parents and shows no indication of any language development.Ahmed seems uninterested in communication of any kind and has significant rituals such as lining up his toys and realigning them every few minutes.He becomes hysterical if anyone interrupts his ritualistic activity.On an IQ assessment designed for very young children, Ahmed's score was extremely low.His prognosis is poor primarily because of

A) lack of language acquisition and low IQ.
B) low IQ and early age of onset.
C) early age of onset and lack of language acquisition.
D) ritualistic behaviour and disinterest in his parents.