$\int_{-1/2}^{1/2} (\cos x) \left[ \log \left( \frac{1-x}{1+x} \right) \right] dx = $

  • A
    $0$
  • B
    $1$
  • C
    $e^{1/2}$
  • D
    $2e^{1/2}$

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