$\left(\frac{\sqrt{6}-\sqrt{2}}{4}+\frac{\sqrt{6}+\sqrt{2}}{4} i\right)^{2020} =$

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

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