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题目材料：
In 2005, 80% of the Central City School Districts total expenditures came from local property taxes, and the rest came from the state government's Aid to Schools Program. If the state had reduced its aid to the district by 50%, by what percentage would local property taxes have had to be increased in order for the district to maintain the same level of expenditures?
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A.10%
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B.12.5%
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C.20%
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D.50%
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E.100%
B显示答案
