$\int_0^{\pi / 2} \frac{\sin x}{1+\cos x+\sin x} d x=$

  • A
    $\frac{\pi}{4}-\frac{1}{2} \log 2$
  • B
    $\frac{\pi}{4}+\frac{1}{2} \log 2$
  • C
    $\frac{\pi}{2}$
  • D
    $\frac{3 \pi}{4}+\log 2$

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