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 showed himself a good student. He proved himself a good athlete.
A. Not only he showed himself a good student but he also proved himself a good athlete.
B. He did not show himself a good student but he proved himself a good athlete.
C. A good student not only showed him but he also proved himself a good athlete.
D. Not only did he show himself a good student but he also proved himself a good athlete.