Some Scientists Would Say That Koko the Gorilla Learned Human

Multiple Choice

Some scientists would say that Koko the gorilla learned human language because she

A) could use signs to form simple phrases and demonstrated a basic understanding of grammar.
B) used the American Sign Language sign for pain while pointing to her mouth, thus communicating that she had a decayed tooth.
C) was able to make requests and other communications by putting together a sequence of communication chips.
D) learned how to communicate on a keyboard by observing and imitating her mother.
E) was able to get what she wanted by responding to reinforcement schedules.