Last year Department Store X had a sales total for December that was 4 times the average (arithmetic mean) of the monthly sales totals for January through November. The sales total for December was what fraction of the sales total for the year?
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A$$\frac{1}{4}$$
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B$$\frac{4}{15}$$
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C$$\frac{1}{3}$$
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D$$\frac{4}{11}$$
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E$$\frac{4}{5}$$