What Do the Language Experiments with Chimpanzees, Bonobos, and Gorillas

Multiple Choice

What do the language experiments with chimpanzees, bonobos, and gorillas indicate?

A) They lack the ability to communicate symbolically.
B) They can learn to use up to 100 spoken words.
C) They have some ability to use signs to communicate.
D) They have human-like vocal tract anatomies.
E) They think symbolically in the same way humans do.