$\int_{1 / 2}^{1 / \sqrt{2}} \frac{1}{\left(x+\sqrt{1-x^2}\right)\left(1-x^2\right)} d x=$

  • A
    $\log (\sqrt{3}+1)$
  • B
    $\log (\sqrt{3}-1)$
  • C
    $\log (3+\sqrt{3})$
  • D
    $\log (3-\sqrt{3})$

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