We have gathered nearly 100,000 quilts, ___ up to half have gone to the flood-hit areas.

         A. with which           B. in which        C. for which      D. of which

We have gathered nearly 100,000 quilts,        up to half have gone to the flood-hit areas.

We have gathered nearly 100,000 quilts,        up to half have gone to the flood-hit areas.

We have gathered nearly 100,000 quilts,         up to half have gone to the flood-hit areas.

1. A.
   of which
2. B.
   in which
3. C.
   with which
4. D.
   for which