He is one of the experienced engineers in this factory ______ hard work was repaid with the development of the factory.

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

He is one of the experienced engineers in this factory ________ hard work was repaid with the development of the factory.

A. where

B. whose

C. in which

D. that

He is one of the experienced engineers in this factory.____ hard work was repaid with the development of the factory.

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