Which Statement About Communication Among Nonhuman Primates Is False

Which statement about communication among nonhuman primates is false?

A) Gorillas use calls and facial expressions to communicate.
B) Nonhuman primate call systems are inflexible.
C) Nonhuman primates use closed systems of communication.
D) Animal call systems are based on tradition and not genetics.
E) Communication among primates is more complex than scientists used to think.

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