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题目材料:

According to a projection made in January 2016, for each of the three years following 2015, annual sales would increase by an amount equal to $$\frac{1}{2}$$ of the increase in annual sales from 2014 to 2015. According to this projection, approximately what would annual sales be for the year 2018 ?
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A.$2,200 million
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B.$2,425 million
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C.$3,450 million
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D.$4,050 million
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E.$4,875 million
B显示答案