Experiments in Which Apes Are Taught a Language or Symbolic

Multiple Choice

Experiments in which apes are taught a language or symbolic system indicate that apes can

A) learn to use symbols to communicate, but only if they are not arbitrary.
B) learn to use words accurately, but only to refer to objects that are physically present.
C) use combinations of familiar symbols to express new concepts.
D) combine words into sentences as well as a human 3-year-old is able to.