The expression $x^{4}+7 x^{2}+16$ can be factored as:

  • A
    $(x^{2}+x+1)(x^{2}+x+16)$
  • B
    $(x^{2}+x+1)(x^{2}-x+16)$
  • C
    $(x^{2}+x+4)(x^{2}-x+4)$
  • D
    $(x^{2}+x-4)(x^{2}-x-4)$

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