If $y = \log_3(\log_3 x)$,then $\frac{dy}{dx}$ at $x = 3$ is $\ldots \ldots$

  • A
    $\frac{1}{3}(\log_e 3)^{-1}$
  • B
    $\frac{1}{3}(\log_e 3)$
  • C
    $\frac{1}{3}(\log_e 3)^{-2}$
  • D
    $\frac{1}{3}(\log_e 3)^{-3}$

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