SHE STUDIED ATTENTIVELY AND HARDER SO THAT SHE COULD GET A BETTER...

15. She studied attentively and harder so that she could get a better result.

A. So as to study attentively and harder, she could get a better result.

B. In spite of studying attentively and harder, she could get a better result

C. In order to get a better result, she studied attentively and harder.

D. Because of studied attentively and harder, she could get a better result.