With Regard to the Attempt to Differentiate Between Attention-Deficit/hyperactivity Disorder

With regard to the attempt to differentiate between attention-deficit/hyperactivity disorder (ADHD) from oppositional defiant disorder (ODD) , it is known that

A) ADHD is a psychological problem while ODD is biological.
B) ADHD is a biological problem while ODD is psychological.
C) ADHD is an internalized problem while ODD is externalized.
D) None of the above is widely agreed to by the professionals.