Choose the sentence that best combines the two given sentences

. Choose the sentence that best combines the two given sentences.
1.  They are stopping all the sporting events at the moment because of the severe storm.

a.      If the storm isn’t severe, they won’t cancel all the sporting events now.

b.     If the storm wasn’t severe, they would cancel all the sporting events.

c.      Without the severe storm, they wouldn’t cancel all the sporting events.

d.     If the storm had been severe, they wouldn’t cancel all the sporting events.