HE IS RIDING A BUS BECAUSE HE MISSED THE LAST TRAIN.A. IF HE HADN'T...

4. He is riding a bus because he missed the last train.

A. If he hadn't missed the last train, he wouldn't be riding a bus.

B. If he hadn't missed the last train, he wouldn't have been riding a bus.

C. If he didn't miss the last train, he wouldn't ride a bus.

D. If he didn't miss the last train, he wouldn't be riding a bus.