What did Calhoun mean by "the behavioral sink?"
A. The shape of the experimental setting was like that of a sink (round with slanted walls), forcing rats to associate more than they normally would in the middle.
B. The degree of abnormal behavior among the high-density rats was so extreme that it seemed like a sinkhole or pit of ever-degenerating behavior
C. The rats in the high-density group failed to carry out their usual cleaning and hygiene behaviors.
D. The rats' behaviors represented a new low in the treatment of animal research subjects.
Answer: B
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