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

  • A
    $\frac{1}{1+(\log x)^{2}}+c$
  • B
    $\frac{x}{1+(\log x)^{2}}+c$
  • C
    $\frac{1}{1+\log x}+c$
  • D
    $\frac{x}{1+\log x}+c$

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