Rolle's theorem is true for the function $f(x) = {x^2} - 4 $ in the interval

  • A

    $[-2, 0]$

  • B

    $[-2, 2]$

  • C

    $\left[ {0,\,{1 \over 2}} \right]$

  • D

    $[0,\,\,2]$

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