$\int_{0}^{3} \frac{3x + 1}{x^2 + 9} dx = $

  • A
    $\log(2\sqrt{2}) + \frac{\pi}{12}$
  • B
    $\log(2\sqrt{2}) + \frac{\pi}{2}$
  • C
    $\log(2\sqrt{2}) + \frac{\pi}{6}$
  • D
    $\log(2\sqrt{2}) + \frac{\pi}{3}$

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