What Research Findings Provide an Optimistic Outlook Suggesting That Many

What research findings provide an optimistic outlook suggesting that many children with ADHD eventually outgrow the disorder?

A) neuroimaging studies that have found differences in ventricular size
B) neuroimaging studies that have found developmental delays in the prefrontal regions of the brain
C) twin studies that have found support for the role of environmental factors in ADHD
D) drug studies that have explored the effect of dopamine levels on behavior and emotional functioning