the most amazing results, however, were the improved test score and attendance, the increased confidence of these students , as well as significant reductions in violence.
이 문장을 not only a , but also b 로 바꾸라고 하는데요

the most amazing results, however, were not only significant reductions in violence, but also the improved test score and attendance, the increased confidence of these students.

이렇게 쓰면 되는건가요? 아니면
the improved test score and attendance - a
the improved test score and attendance - b
significant reductions in violence - c
이렇게 봐야하는건가요? 이렇게 보면 순서는 어떻게 넣어야 하는걸까요?
선생님들의 답변을 기다립니다~