Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
He was successful in his career thanks to his parents' support.
A.Had it not been for his parents' support, he wouldn't be successful in hiscareer.
B.If his parents hadn't supported him, he wouldn't have been successful in hiscareer.
C.Without his parents' support, he would have been successful in hiscareer.
D.But for his parents' support, he wouldn't be successful in hiscareer.