The value of $\left(\frac{1+\sqrt{3} i}{1-\sqrt{3} i}\right)^{64}+\left(\frac{1-\sqrt{3} i}{1+\sqrt{3} i}\right)^{64}$ is

  • A
    $0$
  • B
    $-1$
  • C
    $1$
  • D
    $i$

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