For any integer k greater than 1, the symbol {k}^\ast denotes the product of all the fractions of the form \frac1 t, where t is an integer between 1 and k, inclusive. What is the value of \frac{{5}^\ast} {{4}^\ast}?
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A5
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B\frac{5}{4}
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C\frac{4}{5}
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D\frac{1}{4}
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E\frac{1}{5}
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正确答案: E