Which of the Following Observations Regarding Behaviorism's Language Theory Is

Which of the following observations regarding behaviorism's language theory is incorrect?

A) People speak as they do because they have been reinforced for doing so.
B) Throughout the learning process,behaviorists assumed that children were relatively active.
C) Parents and other speakers were given credit for shaping their younger charges' utterances into intelligible words.
D) Behaviorism cannot explain how children often produce sentences they have never heard before.