In Regard to Their Ability to Learn Language, Nonhuman Primates

Multiple Choice

In regard to their ability to learn language, nonhuman primates

A) have essentially no ability to learn how to use words to communicate.
B) can learn vocabulary and symbol combinations, but the communicative system they can acquire is not generally considered to be a language.
C) naturally use language to communicate with other members of their species, although their languages are not as complex as human languages.
D) do not have the vocal apparatus for producing speech, but when they are taught a sign language, they are able to learn a complex language.