Answer:
The most likely diagnosis for George is D. attention-deficit/hyperactivity disorder.
Step-by-step explanation:
Attention-deficit/hyperactivity disorder (ADHD) is characterized by the lack of focus and attention on the individual's parte. It is a neurobiological disorder which develops during childhood and involves an attentional deficit, as well as a pattern of hyperactivity and impulsivity.
In this case, we can see George is restless, interrupts and has a lack of focus. He is always "on the go" which adds to being restless. His most likely diagnosis is ADHD.