The road becomes so crowded during rush hours, ______ it becomes a very slow route.

The road becomes so crowded during rush hours, ______ it becomes a very slow route.

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

 The road becomes so crowded during rush hours, ______ it becomes a very slow route.

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

The road becomes so crowded during rush hours, ______ it becomes a very slow route.

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

 The road becomes so crowded during rush hours, ______ it becomes a very slow route.

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