To say that a person is psychologically dependent on a drug means that
A) the drug is positively reinforcing.
B) the nervous system now requires the drug to function normally.
C) larger doses of the drug are now needed to produce the same nervous system effects that were produced earlier by smaller doses of the drug.
D) if use of the drug is discontinued, then withdrawal symptoms will develop.
E) all of the above occur.
Correct Answer:
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