According to Stokoe, sign language is ______

A．a famous scholar in the study of the human brain
B．a leading specialist in the study of liberal arts
C．an English teacher in a university for the deaf
D．some senior experts in American Sign Large

A．a new way to be taken at the learning of language
B．a challenge to traditional views on the nature of language
C．an approach to simplifying the grammatical structure of a language
D．an attempt to clarify misunderstanding about the origin of language