試題詳解

46. What is the main idea of the passage?
(A) The processes of physical and mental development are totally different and must not be investigated in the same way.
(B) The development of cognitive structures such as language may be influenced by predetermined genetic controls similar to the genetic controls of physical development.
(C) For the most part, the structures of language are arbitrary and accidental.
(D) The uniformity of speech among individuals in one community supports the social origin of language.