Which of the Following Is True of Autism Spectrum Disorder

Multiple Choice

Which of the following is true of autism spectrum disorder?

A) Those suffering from this disorder are a diverse group,and their level of disability can be relatively mild to quite severe.
B) Autism spectrum disorder can be associated with a single cause.
C) Autism spectrum disorder is usually associated with aging and is often observed in adults experiencing cognitive decline.
D) The symptoms of autism spectrum disorder include trichotillomania but not skin picking.