题目：
选择题
According to the interactional view, language is ＿＿＿＿＿＿
- A. one single prodedure.
- B. a vehicle for the expression of meaning.
- C. a vehicle for the realization of interpersonal relations.
- D. a system of structurally related elements for the coding of meaning.
答案：
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