Which of the following statements is true?

  • A
    $p(x) = x^3 + 8$ has three zeros.
  • B
    $p(x) = x^2 - 36$ has three zeros.
  • C
    $p(x) = 4x^3 + x$ has three zeros.
  • D
    $p(x) = 4x^3 - x$ has three zeros.

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