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 didn’t prepare well for his GCSE examination. He regrets it now.
A.Unless he had prepared well for his GCSE examination, he wouldn’t regret it now.
B.But for his ill preparation for his GCSE examination, he wouldn’t regret it now.
C.If it hadn’t been for his good preparation for his GCSE examination, he wouldn’t regret it now.
D.If he had prepared well for his GCSE examination, he wouldn’t have regretted it now.