1 The cars raced on the tracks. The hunter killed the animal by following its tracks
Sorry I don’t know two for felt
3 The survivors lit a fire to stay warm. The soldiers had to fire their guns.
4 I asked my friend to scratch my back. We had to back up to make room.
I believe the answer is (B) because (A) has an improper use of the colon, and in (C) they put the semi colon after "we" which doesnt make sense because "We had a relaxing lunch we," is not a proper sentence.
You use different words and explain it I think.
