Walking through the ancient ruins, the sheer scale of the architecture astounded the tourists.

Walking through the ancient ruins, the sheer scale of the architecture astounded the tourists.

1. A.Walking through the ancient ruins, the sheer scale of the architecture astounded the tourists.
2. B.Walking through the ancient ruins, the tourists were astounded by the sheer scale of the architecture.
3. C.The sheer scale of the architecture astounded the tourists, walking through the ancient ruins.
4. D.The tourists were astounded by the sheer scale of the architecture, walking through the ancient ruins.