As your textbook notes,there has been a dramatic increase in the number of children diagnosed as autistic in recent decades.This increase is thought to stem primarily from:
A) greater awareness of the symptoms of this disorder
B) an increase in susceptibility to the disorder
C) changes in the levels of environmental toxins linked to the disease
D) viral factors not yet identified

Question

Quizplus · Accepted Answer

The dramatic increase in the number of children diagnosed as autistic in recent decades is primarily due to greater awareness of the symptoms of this disorder. As awareness has increased, more cases have been identified and diagnosed. There is limited evidence to support the suggestion that an increase in susceptibility to the disorder or changes in levels of environmental toxins linked to the disease have contributed to this increase. Additionally, there is little evidence to suggest that unidentified viral factors could be the cause.

As Your Textbook Notes,there Has Been a Dramatic Increase in the Number