Which of the following is NOT mentioned as a measure to control the flows of immigration？A
专四
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Which of the following is NOT mentioned as a measure to control the flows of immigration？
A．Cooperation with the sending countries.
B．Tightening the criteria for admission.
C．Restricting the number of foreign labour.
D．Use of economic incentives.
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
细节题。倒数第三段第二句提到，输出国与接收国政府间的合作也是必要的，故排除[A]；第三段末句提到，推行这类计划的成员国将需要设置移民限额，故排除[C]；倒数第三段首句提到，或许可以通过经济手段促使外来移民在合同期满时离境，故排除[D]；文中并未提到调整移民标准的问题，故答案为[B]。