Ben Is a First Grader Who Has Difficulty in Class

Ben is a first grader who has difficulty in class. He distracts his classmates by fidgeting, talking, and playing when he is supposed to be listening to his teacher. Ben's teacher must constantly remind him to sit still and pay attention. Ben can most likely be diagnosed with:

A) anxiety disorder
B) Asberger's syndrome
C) Impulse control disorder
D) attention-deficit hyperactivity disorder