Stimulant Drugs,such as Nicotine,amphetamines,cocaine,and Caffeine,achieve Their Effects by

Stimulant drugs,such as nicotine,amphetamines,cocaine,and caffeine,achieve their effects by

A) increasing the heart rate and blood pressure.
B) decreasing the rate of dopamine and serotonin entering the brain.
C) increasing the availability of GABA and ACH to the nucleus accumbens.
D) increasing the availability of dopamine,serotonin,and norepinephrine to the nucleus accumbens.
E) influencing the rate of blood flow into the brain.