$\int_0^1 \sqrt{\frac{2+x}{2-x}} \, dx =$

  • A
    $\pi+2$
  • B
    $\frac{1}{2}(\pi+2)$
  • C
    $\frac{\pi}{2}+2+\sqrt{3}$
  • D
    $\frac{\pi}{3}+2-\sqrt{3}$

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