Have you ever been in a situation _____ you know the other person is right yet you cannot agree with him?

Have you ever been in a situation ________ you know the other person is right yet you cannot agree with him?

1. A.
   by which
2. B.
   that
3. C.
   in where
4. D.
   where

Have you ever been in a situation _____ you know the other person is right yet you cannot agree with him?

       A. by which    B. that     C. in where     D. where

Have you ever been in a situation _______you know the other person is right yet, but you can not agree with him?

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

Have you ever been in a situation _____ you know the other person is right yet you cannot agree with him?