Identifying Stimulants and Their Effects on Dopamine

When examining the effects of psychoactive drugs, it's critical to understand how they interact with neurotransmitters in the brain. Certain drugs can mimic or inhibit the action of neurotransmitters, leading to various psychological effects. For example, opiates are known to primarily interact with opioid receptors in the brain.

Based on your knowledge of psychoactive drugs and their classifications, which of the following substances is most likely to produce a feeling of euphoria by primarily acting as a stimulant and enhancing the levels of dopamine in the brain?