Which of the following mechanisms?

The parents of an 8-year-old boy bring him to see a psychiatrist because they are frustrated with his behavior. In the last two years he has become increasingly restless and moody, interrupts other children in the classroom, and often runs into the street without looking out for cars first. The psychiatrist prescribes a medication that works through which of the following mechanisms?

(A) Increases release of norepinephrine
(B) Inhibits acetylcholine activity
© Inhibits reuptake of serotonin
(D) Stimulates dopamine receptors
(E) Stimulates serotonin receptors