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  3. Immigration is in the headlines again, with President Obama’s decision last week to stop deporting young illegal immigrants who

Immigration is in the headlines again, with President Obama’s decision last week to stop deporting young illegal immigrants who

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问题    Immigration is in the headlines again, with President Obama’s decision last week to stop deporting young illegal immigrants who came to the United States as children, and the Supreme Court’s approaching decision on the constitutionality of Arizona’s crackdown on undocumented migrants. But too much of the public debate has focused on the legality of immigration without considering a more fundamental question: What effects has mass immigration had on American society?
   
   Some of the most meticulous research was done to date about the effects of immigration on a cross section of American communities—urban, suburban and rural. The scholars who participated were in remarkable agreement: while new immigrants are poorer than the general population and face considerable hardship, there is no evidence that they have reshaped the social fabric in harmful ways.
   America is neither less safe because of immigration nor is it worse off economically. In fact, in the regions where immigrants have settled in the past two decades, crime has gone down, cities have grown, poor urban neighborhoods have been rebuilt, and small towns that were once on life support are springing back. Scholars can’t say for sure that immigration caused these positive developments, but we know enough to reject the notion that immigrants worsen social ills.
   Scholars found that immigrant youths in Los Angeles were involved in less crime and violence than their native-born peers in similar economic circumstances. Research also has shown that an increase in immigration in cities like San Antonio and Miami did not produce an increase in the homicide rate. Furthermore, social scientists found that people in immigrant communities in New York were less cynical about the law than were people in less diverse communities; they were also more likely to indicate that they would cooperate with the police.
   If migration has had such beneficial effects, why, then, has there been such a persistent backlash? Part of the answer surely lies in the social change—language, political attitudes, religious mores—that immigrants bring. The leveling-off of migration, especially from Mexico, may bring a sense of relief to opponents of these social changes, but if the new research is any guide, the consequences of the slowdown may be the opposite of what the critics intend.
   Mr. Obama’s decision to exempt undocumented children who were brought to the United States by their parents from harsh deportation rules is an overdue, but welcome, first step. Establishing a clear path to citizenship for undocumented adults, creating a more permissive guest-worker program, and preserving families rather than separating them through deportation are controversial ideas, but they deserve a hearing.
What does the author make use of to show the desirable effects of immigration?
选项 A、Induction.
B、Illustration.
C、Comparison.
D、Explanation.
答案C
解析 推断题。第四段主体阐述了移民的有利影响：将洛杉矶移民青年与本地青年暴力、犯罪率进行了横向对比，将圣安东尼奥和迈阿密等城市移民数量增加后杀人恶性案件发生率进行了纵向对比，同时还将纽约移民社区居民与本地居民对待法律态度以及与警方合作态度进行了横向对比。由此可见，作者为了说明移民产生的有利影响，借鉴了学者们的研究方法(对比、对照)来阐述这一问题，C项正确。
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