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题目材料：
For each year, the work time, in hours, required to pay for a food item is the average price of the food item divided by the average hourly wage for rank-and-file manufacturing workers. The work time in the graph is given in minutes.
Eight hours of work time paid for approximately how many more dozen eggs in 1997 than it did in 1919 ?
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A.50
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B.70
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C.90
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D.110
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E.130
C显示答案
