$\int_0^1 \frac{8 \log (1+x)}{1+x^2} \,d x=$

  • A
    $\frac{\pi}{2} \log 2$
  • B
    $\pi \log 2$
  • C
    $-\pi \log 2$
  • D
    $\frac{-\pi}{2} \log 3$

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