Melcia's parents were surprised to learn that is the most likely to be effective in the treatment of their daughter, even though her disorder, autism, has biological origins.

Melicia's parents were surprised to learn that behavioral therapy is most likely to be effective in the treatment of their daughter, even though her disorder, autism, has biological origins.
Rationale: Behavioral therapy is the most effective treatment for behavior problems that range from bed wetting to impulsive anger and even for problems that have biological origins, such as autism.