She is stubborn in resisting his enquiries about the Moonstone _____ the degree that she makes it seem as if she does not want the mystery ______.

She is stubborn in resisting his enquiries about the Moonstone _____ the degree that she makes it seem as if she does not want the mystery ______

1. A.
   on; to solve
2. B.
   with; solving
3. C.
   for; being solved
4. D.
   to; to be solved

She is stubborn in resisting his enquiries about the Moonstone _____ the degree that she makes it seem as if she does not want the mystery ______.

   A. on; to solve                           B. with; solving 

  C. for; being solved                     D. to; to be solved

She is stubborn in resisting his enquiries about the Moonstone _____ the degree that she makes it seem as if she does not want the mystery ______.