The best evidence that great apes use grammar is
A)the large size of their vocabulary.
B)that most most utterances are multiple word phrases.
C)that two-word utterances did not occur in random order.
D)that they could convey their desires to humans.

Question

Quizplus · Accepted Answer

The fact that two-word utterances did not occur in random order suggests that there is some underlying grammatical structure guiding the apes' communication. This implies that they use grammar in their language. A large vocabulary and the ability to convey desires to humans are not necessarily indicative of the use of grammar. While most utterances being multiple word phrases is a potential indicator of grammar use, it is not as strong evidence as the specific ordering of two-word phrases.

The Best Evidence That Great Apes Use Grammar Is