$\int_0^1 \frac{\tan^{-1} x}{1 + x^2} \,dx = $

  • A
    $\frac{\pi^2}{8}$
  • B
    $\frac{\pi^2}{16}$
  • C
    $\frac{\pi^2}{4}$
  • D
    $\frac{\pi^2}{32}$

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