In Köhler’s experiment in which chimpanzees were left alone in a room with several boxes and bananas hanging out of reach, what statement describes how the experiment ended?
a. The chimps tried to jump up to reach the bananas but were unsuccessful.
b. The chimps stacked the boxes on top of each other, climbed up, and successfully retrieved the bananas.
c. The chimps became aggressive with each other.
d. The chimps simply played with the boxes paying no attention to the out-of-reach bananas.
Answer: B
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