Modern Psychologists Who Study How We Use Language Believe That

Modern psychologists who study how we use language believe that

A) thought is merely subvocal language.
B) most, if not all, of the sentences we use are ones we have heard in the past and memorized.
C) we learn rules for making and interpreting sentences, rather than memorizing all the sentences we will ever use.
D) all primates are capable of understanding and producing language.