The Onset of the Symptoms of Autism Spectrum Disorders Typically

The onset of the symptoms of autism spectrum disorders typically manifest in:

A) Childhood when the child is attending school and unable to conform to the learning and behavioral demands of the classroom
B) The first year of life when the infant demonstrates significant delays in the development of motor skills
C) The preschool years, but deficits may not become fully obvious until social communication demands exceed the child's limited capacities
D) Adolescence when relationships become nuanced and complex as the young person has to function in multiple occupational roles