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.
Some people say that the answer to crime is to build more prisons, but more sensitive observers argue that instead we should address the sources of crime through reduced poverty, a cut off supply of illicit drugs, and by focusing on keeping kids in school.（）
A. through reduced poverty, a cut off supply of illicit drugs, and by focusing on keeping kids in school
B. by the reduction of poverty, cutting off the supply of illicit drugs, and to focus on keeping kids in school
C. by reducing poverty, cutting off the supply of illicit drugs, and focusing on keeping kids in school
D. by means of reducing poverty, cutting off the supply of illicit drugs, and through focusing on keeping kids in school
E. to reduce poverty, cut off the supply of illicit drugs, and to focus on keeping kids in school