In a study by Bozarth and Wise (1985), rats were given unrestricted access to cocaine for 30 days. What were their observations from this study?
a. The rats used a lot of cocaine initially and then stopped using it when it started to get in the way of their eating.
b. Eighty percent of the rats refused to use it because the effects were so negative.
c. Five percent developed physiological dependence. The rest of the rats were reasonable in their use of the drug.
d. Ninety percent of the rats died within the 30 days due to their unending use of the cocaine.
Answer: D
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