He was successful in his career. It was thanks to his...

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
He was successful in his career. It was thanks to his parents' support.
A. Had it not been for his parents' support, he wouldn't be successful in his career.
B. If his parents had supported him, he wouldn't have been successful in his career.
C. But for his parents' support, he wouldn't have been successful in his career.
D. Without his parents' support, he would have been successful in his career.