______ 200BC, the Silk Road, which was the route for trade between the East and the West, was in use.

1. A.
   As early as
2. B.
   As far as
3. C.
   As long as
4. D.
   As well as

 ________ 200BC, the Silk Road, which was the route for trade between the East and the West, was in use.

   A. As early as         B. As far as            C. As long as                D. As well as

________ 200BC, the Silk Road, which was the route for trade between the East and the West, was in use.