Young Aiden does not demonstrate any real need for a relationship with his parents, has developed no age-appropriate communication skills, and can sit for hours on end rocking back and forth without needing any additional stimulation

If he has a particularly bad moment, he may start punching himself in the face. Aiden might be appropriately diagnosed with __________.
a. Asperger syndrome
b. autism
c. Down syndrome
d. childhood disintegrative disorder

Answer: B