If four numbers are randomly selected without replacement from set {1, 2, 3, 4}, what is the probability that the four numbers are selected in ascending order?
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A$$\frac{1}{256}$$
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B$$\frac{1}{64}$$
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C$$\frac{1}{48}$$
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D$$\frac{1}{24}$$
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E$$\frac{1}{12}$$
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正确答案: D