Why Do Addictive Substances Create a Strong Feeling of Pleasure

Multiple Choice

Why do addictive substances create a strong feeling of pleasure when humans clearly do not require them to survive?

A) They artificially block dopamine receptors, causing the body to react by producing extremely high levels of dopamine"
B) Addictive substances foster a placebo effect of pleasure, though there is no real chemical release"
C) They short-cut the reward system and flood the brain with chemicals that give feelings of pleasure"
D) All of the above"