IF IT HADN'T BEEN FOR HIS CARELESSNESS, HE WOULD HAVE FINISHED THE...

57. If it hadn't been for his carelessness, he would have finished the work.A. He was careless because he had not finished the work.B. If he were careful, he would finish the work.C. If he had been more careful, he would have finished the work.D. Because he wasn't careless, he didn't finish the work.