Question

According to the current evidence discussed in the text, which of the following statement is true?
a. Humans are the only species capable of conveying information pertaining to specific components of the external environment.
b. Nonhuman primates can communicate any information except that which pertains to their emotional state.
c. Some nonhuman primates appear to give specific alarm calls that refer to particular categories of predators.
d. Free-ranging monkeys and apes use symbolic language in the same manner as humans.
e. Some monkeys communicate about past and future events by means of symbolic gestures.

Answer

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