Current theory and research on ADHD indicates that:
A) The lateral area of the prefrontal cortex is the most significant area of the brain involved in ADHD.
B) Significant reductions in volume of the cerebrum and cerebellum are potentially involved.
C) Delays of up to 7 years in the maturation of the cortex have been related to ADHD.
D) ADHD may be due to an excess of dopamine.