_____ we stood at the top of the building, the people below were hardly visible.

_____ we stood at the top of the building, the people below were hardly visible.

1. A.
   As
2. B.
   Although
3. C.
   Unless
4. D.
   In spite of

_____ we stood at the top of the building, the people below were hardly visible.

A. As                B. Although           C. Unless            D. In spite of

_____ we stood at the top of the building, the people below were hardly visible.