Beth and Tim Have Recently Discovered That Their Three-Year-Old Daughter

Beth and Tim have recently discovered that their three-year-old daughter has autism spectrum disorder.Beth and Tim are both nutrition fanatics and are convinced that they can cure their daughter with vitamins and diet.What would you tell Beth and Tim?

A) Vitamins and diet are currently being investigated as a promising treatment for autism, but the results are too preliminary to draw any conclusions.
B) Vitamins and diet have been shown to be effective, but the gains are not sufficient to be considered a cure.
C) Vitamins and diet do not appear to be an effective treatment for autism.
D) Vitamins and diet may improve their daughter's symptoms, but it is necessary to consult a professional to determine exactly which dietary deficiencies may be involved.