Let $\alpha, \beta, \gamma, \delta$ be the roots of the equation $x^4 + x^2 + 1 = 0$. Then,the equation whose roots are $\alpha^2, \beta^2, \gamma^2, \delta^2$ is:

  • A
    $x^2 + x + 1 = 0$
  • B
    $(x^2 + x + 1)^2 = 0$
  • C
    $(x^2 - x + 1)^2 = 0$
  • D
    $x^4 - x^2 + 1 = 0$

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