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Modern science has given clear evidence ______ smoking can lead to many diseases.
A. what       B which        C. that     D where

Modern science has given clear evidence ______ smoking can lead to many diseases.

A. what????????????? B. which??????????? C. that??????????? D. where

Modern science has given clear evidence ______ smoking can lead to many diseases.

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

Modern science has given clear evidence ______ smoking can lead to many diseases.

A. what       B which        C. that     D where

Modern science has given clear evidence ______ smoking can lead to many diseases.

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

 Modern science has given clear evidence _______ smoking can lead to many diseases.

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

 Modern science has given clear evidence ____ smoking can lead to many diseases.

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