The snowfall was very heavy in the capital city of England. All the trains there were cancelled.

A. If it hadn’t been for the heavy snowfall, all the trains in the capital city of England would have been cancelled.

B. Only after all the trains in the capital city of England were cancelled dit it snow heavily.

C. So heavy was the snowfall that all the trains in the capital city of England were cancelled.

D. Had it snowed heavily, all the trains in the capital city of England wouldn’t have been cancelled.