What Did a Study Conducted in Toronto by Rucklidge and Kaplan

What did a study conducted in Toronto by Rucklidge and Kaplan determine about the functioning of adults who had a history of Attention Deficit Hyperactivity Disorder?

A) Although symptoms were still present, the adults had learned to adapt to them.
B) Experiencing career success was the factor that led to improved adult functioning.
C) Most adults still had social impairments and other disturbances.
D) Adult usually went on to develop comorbid Axis I disorders.