real2008 wrote: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

why not E?

IMO A. B is clearly out because of "where", C is out because of "to", E is also out for the same reason as C.. D is out because, "you can not package a product inside the box". Moreover, "find a replacement" is singular. So ,it should be "the box" and not "boxes". From this aspect also, D is out.

Pls post the OA.

real2008 wrote: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

why not E?

E is not the correct option because a complete clause should follow after "in which"

But "to package their product" does not have subject as in option A and E.

More details on the following link:

https://www.my-gmatprep.blocked/

The above link says that

"Remember: If “where” or “in which” is to be used in a sentence, then you must be sure to use a complete stand alone sentence following “where” or “in which”."

HTH.

oa is A. thanks to both goelmohit2002 and arunpp for useful explanations.