Which of the Following Best Describes the Difference in Mechanism

Multiple Choice

Which of the following best describes the difference in mechanism of action between methylphenidate and amphetamine?

A) Amphetamine works on dopamine, methylphenidate on norepinephrine.
B) Amphetamine works on norepinephrine, methylphenidate on dopamine.
C) Amphetamine increases the release of dopamine from presynaptic vesicles; methylphenidate slows the dopamine transporter system that removes dopamine from the synaptic cleft.
D) Methylphenidate increases the release of dopamine from presynaptic vesicles; amphetamine slows the dopamine transporter system that removes dopamine from the synaptic cleft.