| In the face of widespread concern about environmental waste, compact disc manufacturers are attempting to find a replacement for the disposable plastic box in which they package their product. (A) the disposable plastic box in which they (B) the disposable plastic box where they (C) a disposable plastic box in which to (D) disposable plastic boxes inside which they (E) the disposable plastic boxes in which to 答案是A,A和B有什么区别吗 | 
