Efforts to Teach Language to Nonhuman Primates __________

Multiple Choice

Efforts to teach language to nonhuman primates __________.

A) prove that, with appropriate training, any animal can acquire a vocabulary of several dozen symbols
B) show that, after extensive training, chimpanzees using sign language can produce complex sentences
C) have been completely unsuccessful because animals cannot learn even basic language
D) show that the ability to master a grammatically complex language system is unique to humans