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题目材料：
Recent data seem to indicate that economic classes in Bartonia have been growing farther apart from one another in terms of spending power: government reports show that on average, the weekly spendable earnings of private-sector nonsupervisory workers have declined by ten percent in the past ten years and are now at their 1974 level. The claim that progress is being made toward economic equality in Bartonia is thus becoming increasingly difficult to sustain.
Which of the following, if true, would most seriously weaken the argument given?
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A.The rate of unemployment in Bartonia has fluctuated greatly in the past ten years.
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B.On average, the highest-paid workers in the public sector in Bartonia have maintained the level of their spendable income over the past ten years.
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C.On average, the spendable income of workers in Bartonia declined in the 1970s.
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D.On average, supervisors and owners in Bartonia have experienced a decline in the level of their spendable income over the past ten years.
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E.During the 1970s, economic classes in Bartonia grew closer together in terms of spending power.
D显示答案
