다음 글의 빈칸에 들어갈 말로 가장 적절한 것을 고르시오.
Furthermore, linguist and philosopher Noam Chomsky states, “We are designed to walk. That we are taught to walk is _______. And pretty much the same is true of language. Nobody can be taught language. In fact, you can’t prevent the child from learning it.”
① natural
② preventable
③ impossible