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.\(\frac{1}{2}\)