Evidence has been piled up ______ drinking water after getting up in the morning contributes to one’s health.

A. what              B. which          C. if          D. that

Evidence has been piled up________ drinking water after getting up in the morning contributes to one’s health.

   A. what              B. which                C. if               D. that

Evidence has been piled up _______ drinking water after getting up in the morning contributes to one’s health.

A. what　 　 B. which C. if　　 D. that

Evidence has been piled up_____drinking water after getting up in the morning contributes to one’s health.

1. A.
   what
2. B.
   which
3. C.
   if
4. D.
   that

Evidence has been piled up_____drinking water after getting up in the morning contributes to one’s health.

A. what                 B. which               C. if                      D. that