Researchers Who Taught a Gorilla Named Koko to Use Sign

Multiple Choice

Researchers who taught a gorilla named Koko to use sign language found that through age 5 her vocabulary was ________ the spoken vocabulary of a human 5-year-old and was ________ than the vocabulary of a deaf 5-year-old child using sign language.

A) smaller than; larger than
B) smaller than; about the same as
C) about the same as; larger than
D) smaller than; smaller than