Research on Animals and Language Indicates That

Multiple Choice

Research on animals and language indicates that:

A) dolphins are able to express an infinite number of novel utterances through whistles, and dolphins comprehend many human gestures as well.
B) humans are the only species that evolved with the natural ability to express and comprehend an infinite number of novel utterances.
C) African grey parrots are able to communicate effectively with U.S. researchers once the parrots have been taught to vocalize in English.
D) bonobos seem to be able to produce original sentences through a variety of grunts and screeches.