Researchers have attempted to teach human languages to apes and African gray parrots, among others. What was one result of these interactions, based on the cases described in your text?
a. ?A chimpanzee successfully learned to vocalize a large number of words.
b. ?A chimpanzee became virtually fluent in the comprehension of English language.
c. ?An African gray parrot learned to engage in wide-ranging conversations on abstract topics.
d. ?A gorilla was trained to communicate in sign language.
ANSWER:
d
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