8. ( ) Addiction to drugs probably occurs because the drugs
(A) activate the dopamine system.
(B) produce unpleasant withdrawal symptoms.
(C) sensitize reward neurons.
(D) All of the above are true.
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統計: A(0), B(0), C(1), D(7), E(0) #3057008
統計: A(0), B(0), C(1), D(7), E(0) #3057008