He does so little work in the office that for all practical purposes it would make no difference _______ he didn’t come.

       A. if                            B. when               C. why                  D. whether

He does so little work in the office that for all practical purposes it would make no difference _______ he didn’t come.

1. A.
   if
2. B.
   when
3. C.
   why
4. D.
   whether