Write a vector equation of the line that passes through P(4, 7) and is parallel to a = (3, 8).
A. (x-8, y-15) = t(9 8)
B. (x-4, y-7) = t(3, 8)
C. (x+10, y+9) = t(8, -4)
D. (x+15, y+14) = t(8, 9)
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