Given the sets A = [2, 4, 6, 8] and B = [2, 3, 5, 9]. If a number is picked at random from each of the two sets, what is the probability that their difference is 6 or 7?

A. \(\frac{1}{256}\)
B. \(\frac{1}{16}\)
C. \(\frac{1}{8}\)  
D. \(\frac{1}{2}\)

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Correct Answer: C