Neuroscientist Dr. David Chen argues that addiction is a brain disease, not a moral failing, because prolonged substance use physically changes brain reward circuits.
4
readingWhich medical evidence would best support Chen's disease model?
A
Addiction runs in families
B
Brain scans of addicts show 30-40% reduction in dopamine receptors and decreased activity in decision-making regions, changes that persist for years after substance use stops
C
Treatment is helpful
D
Many people try drugs
Correct Answer: B
Choice B is the best answer. Documented brain changes + persistence proves biological basis.
💡 Strategy: Disease classification claims need evidence of persistent biological changes.