A University Team of Child Psychologists Has Just Completed a Longitudinal

A university team of child psychologists has just completed a longitudinal study of children who were diagnosed with Attention-Deficit/Hyperactivity Disorder. These children are now in their 20s. When they examine the data to determine what happens to the symptoms, what are they likely to find?

A) The symptoms often decrease during the adolescent years.
B) There is a rapid decrease in symptoms from childhood to adolescence.
C) The symptoms increase and decrease in a random pattern across time.
D) The symptoms tend to continue through adolescence, and into the adult years.