题目内容：
Allen and Beatrice Gardener managed to communicate with the chimpanzee by ________. A)
training the chimpanzee to learn human language in an entirely new method
B)
creating a language both man and the chimpanzee were able to use
C)
using animal. s vocal language which the chimpanzee was able to understand
D)
learning the chimpanzee.s language with an entirely new approach
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