Chance Is a Young Boy with Autism

Chance is a young boy with autism. Recently his parents have discovered a way to treat his disorder and have begun training in applied behaviour analysis. After 4 years of using this treatment with their son, which of the following complaints might they have?

A) Chance's social skills will have improved but he will still never be like children without autism.
B) Chance will still score very low on IQ tests despite the intensive treatment, meaning he will still be in special classes at school.
C) One parent may have to quit his/her job to keep up the treatment at home.
D) Chance's attentional capacity will still be so limited that they will need to train him at least 80 hours a week until he is age 10 or older.