题目：
选择题
According to Chomsky, LAD is described as ＿＿＿＿.
- A. a device that is culturally transmitted.
- B. a device that is shared by all animals.
- C. an imaginary "black box" which exists somethwere in the brain.
- D. a device that consists of a set of principles.
答案：
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