The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.
These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.
The police chief argued that first-time offenders who have no high school diploma but who have families with a record of crime probably break the law again.（）
A. who have no high school diploma but who have families with a record of crime
B. without a high school diploma and families having a criminal record
C. without a high school diploma whose families have a record of crime
D. whose families have criminal records and lacking high school diplomas
E. lacking high school diplomas and also having families having criminal records
参考答案：C
解析：
C is the clearest and most concise choice. A is less concise, and it is unclear why "but" is used here; B implies that the offenders lack both diplomas and families; D implies that the families lack diplomas; and E is awkwardly worded.