Which of the following is the quotient of the rational expressions shown below?
(4x + 1) / (6x) divided by (3x - 1) / (6x^2)
A. (12x^2 - x - 1) / (6x^2)
B. (4x + 1) / (18x - 6)
C. (5x + 1) / (9x - 1)
D. (6x^2) / (6x)