I got a modified version of the question in GMATPrep EP2. Please have a look at the below question:
In 1960’s studies of rats, scientists found that crowding increases the number of attacks among the animals significantly. But in recent experiments in which rhesus monkeys were placed in crowded conditions, it was not such attacks that increased significantly,but rather instances of “coping” behavior, such as submissive gestures, avoidance of dominant individuals and huddling with relatives.
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In 1960’s studies of rats, scientists found that crowding increases the number of attacks among the animals significantly. But in recent experiments in which rhesus monkeys were placed in crowded conditions, it was not such attacks that increased significantly,but rather instances of “coping” behavior, such as submissive gestures, avoidance of dominant individuals and huddling with relatives.
...
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