Identification of Dopaminergic Stimulants

In the context of psychoactive drugs, the interactions between neurotransmitters and these substances can lead to a variety of psychological and physiological effects. One important neurotransmitter involved in this process is dopamine, which plays a key role in the brain's reward circuitry. It is well-established that different psychoactive drugs can either enhance or inhibit dopaminergic activity, leading to feelings of pleasure or, in some cases, addiction.

Considering the influence of psychoactive drugs on dopamine pathways, which of the following drugs is primarily a dopaminergic stimulant, known for its potential to cause euphoria and a significant risk of dependency?