Both tens and the unit digits of a two-digit number are greater than or equal to 1 and less than or equal to 4. What is the probability that the sum of the digits of this number is a multiple of 3?
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A$$\frac{5}{12}$$
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B$$\frac{5}{13}$$
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C$$\frac{5}{14}$$
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D$$\frac{1}{3}$$
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E$$\frac{5}{16}$$
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正确答案: E