Paragraph 4 __________. 查看材料A.What causes autism？B.

Paragraph 4 __________. 查看材料

A.What causes autism？

B.How common is autism？

C.Does autism occur together with other disabilities？

D.What is Autism？

E.What kinds of jobs can individuals with autism do？

F.What is the difference between autism and mental retardation？

请帮忙给出正确答案和分析，谢谢！