<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 7-year-old boy is brought in to clinic by his parents with a chief concern of poor performance in school. The parents were told by the teacher that the student often does not turn in assignments, and when he does they are partially complete. The child also often shouts out answers to questions and has trouble participating in class sports as he does not follow the rules. The parents of this child also note similar behaviors at home and have trouble getting their child to focus on any task such as reading. The child is even unable to watch full episodes of his favorite television show without getting distracted by other activities. The child begins a trial of behavioral therapy that fails. The physician then tries pharmacological therapy. Which of the following is most likely the mechanism of action of an appropriate treatment for this childs condition?? A: Increases the frequency of GABAa channel opening, B: Increases the duration of GABAa channel opening, C: Antagonizes NMDA receptors, D: Decreases synaptic reuptake of norepinephrine and dopamine, E: Blockade of D2 receptors,  <response>: This is a clinical vignette describing a 7-year-old boy with symptoms of inattention, hyperactivity, and impulsivity, which are classic symptoms of attention deficit hyperactivity disorder ADHD. The vignette states that behavioral therapy failed, so pharmacological therapy was tried next. The question asks about the mechanism of action of an appropriate pharmacological treatment for this childs condition.Choice A describes increasing GABA activity, which would treat anxiety or seizures, not ADHD. Choice B also describes increasing GABA activity.Choice C describes blocking NMDA receptors, which is used for Alzheimers disease or depression, not ADHD.Choice D describes blocking reuptake of norepinephrine and dopamine, which increases these neurotransmitters and is the mechanism of stimulant medications used to treat ADHD.Choice E describes blocking dopamine D2 receptors, which is the mechanism of antipsychotics, not used for ADHD.D: Decreases synaptic reuptake of norepinephrine and dopamine 