$\lim _{x \rightarrow 0} \frac{27^x-9^x-3^x+1}{\sqrt{5}-\sqrt{4+\cos x}}=$

  • A
    $8 \sqrt{5} \log 3$
  • B
    $16 \sqrt{5} \log 3$
  • C
    $8 \sqrt{5}(\log 3)^2$
  • D
    $\sqrt{5}(\log 3)^2$

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