Evaluate the integral: \(\int \frac{7\sqrt{x^2-9}}{x^3}dx\)

A) \(\int \frac{7}{x^2\sqrt{x^2-9}}dx\)
B) \(\int \frac{7\sqrt{x^2-9}}{x^2}dx\)
C) \(\int \frac{7\sqrt{x^2-9}}{x^3}dx\)
D) \(\int \frac{7}{\sqrt{x^2-9}}dx\)