XDF蓝皮书 P124-9

In the fact of widespread concern zbout environmental waste, compact disc manufaturers are attempting to find a replacement for the disposable plastic box in which they package their product.

A.the disposable plastic box in which

B.the disposable plastic box where

这里where ,in which有区别吗？

觉得是一样的啊

这是一个ETS的偏好吗？

可以当作固定规律来记吗？