질문 내용 :

5. 다음 글에서 밑줄 친 부분 중 어법상 어색한 것은?
A former County sheriff ①found guilty of ②violating his oath of office during a trial last month in which he was accused of taking bribes ③was sentenced in Clarke County Superior Court Thursday to two years of probation. The sentence, ④in which 26-year-old sheriff avoided a possible maximum penalty of five years in prison, resulted from an agreement ⑤reaching between District Attorney Ed Brumby and defense attorney Tom Jones.

1, 2, 3번은 답이 아니라는 것은 이해가 갑니다. 답이 5번일 것 같은데 확실하지가 않네요ㅠㅠ
4번과 5번중에 답은 무엇인지, 그리고 나머지 하나는 왜 맞는 답인지 가르쳐주시면 감사하겠습니다!