Which Statement Is an Example of a Downward Counterfactual

Which statement is an example of a downward counterfactual

A) If the tornado's path was different, there would have been less damage.
B) If the house was sturdier, the tornado wouldn't have blown the roof away.
C) If the tornado was stronger, the sirens would have sounded sooner.
D) If the tornado had hit seconds earlier, we would have all died.