$\int_0^{\pi / 4} x^2 \sin 2x \, dx =$

  • A
    $\frac{\pi^2-2}{8}$
  • B
    $\frac{\pi(\pi-2)}{8}$
  • C
    $\frac{\pi-2}{8}$
  • D
    $\frac{\pi+2}{8}$

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