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With the rapid globalization of science itself ( more than 40 percent of scientific Ph. D. students trained in the United States

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问题      With the rapid globalization of science itself ( more than 40 percent of scientific Ph. D. students trained in the United States are now foreign nationals, roughly half of whom return to their countries of origin), the once undisputed U. S. scientific lead, whether relevant to product lead or not, is diminishing.
     The competition of foreign students for positions in U. S. graduate schools has also contributed to making scientific training relatively unattractive to U. S. students, because the rapidly increasing sup ply of students has diminished tile relative rewards of this career path. For the best and brightest from low-income countries, a position as a research assistant in the United States is attractive, whereas the best and brightest U. S. students might now see better options in other fields. Science and engineering careers, to the extent that they are opening up to foreign competition (whether imported or available through better communication) ,also seem to be becoming relatively less attractive to U. S. students.
     With respect to the role of universities in the innovation process, the speculative boom of the 1990s (which, among other things, made it possible to convert scientific findings into cash rather quickly) was largely unexpected. The boom brought universities and their faculties into much closer contact with private markets as they tried to gain as much of the economic dividends from their discoveries as possible. For a while, the path between discoveries in basic science and new flows of hard cash was considerably shortened. But during the next few decades, this path likely will revert toward its more traditional length and reestablish, in a healthy way, the more traditional (and more independent) relationship between the basic research done at universities and those entities that translate ideas into products and services.
     In the intervening years, another new force also greatly facilitated globalization: the rapid growth of the Internet and cheap wide-bandwidth international communication. Today, complex design activities can take place in locations quite removed from manufacturing, other business functions, and the consumer. Indeed, there is now ample opportunity for real-time communication between business functions that are quite independent of their specific locations. For example, software development, with all its changes and complications, can to a considerable extent be done overseas for a U. S. customer. Foreign call centers can respond instantly to questions from thousands of miles away. The result is that low-wage workers in the Far East and in some other countries are coming into ever more direct competition with a much wider spectrum of U. S. labor: unskilled in the case of call centers; more highly skilled in the case of programmers.
What can be inferred from the last sentence of the text?
选项 A、Low-wage workers from other countries are welcomed in the U. S. than the U. S. labor.
B、He competition between low-wage workers from other countries and the U. S. labor become more direct in more fields than before.
C、Unskilled workers will face more direct competition than highly skilled workers.
D、The low-wage workers from other countries compete with the U. S. labor only in the fields of call centers and programmers.
答案B
解析 文章最后一句说明来自远东和其他国家的低薪工人与美国劳动力的竞争范围更加广泛，也更加直接，从不需要什么技术的电话中心的工作到需要技术的程序员都存在双方的竞争。A文中未提及。C文中没有比较非技术的和技术的工人面临竞争的比较。 D只是文中举出两个极端的例子，旨在说明竞争范围更加广泛，而非说明这两个行业存在竞争。
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