If $y = 1 + \frac{x}{1!} + \frac{x^2}{2!} + \frac{x^3}{3!} + \dots \infty$,then $x = $

  • A
    $\log_e y$
  • B
    $\log_e \frac{1}{y}$
  • C
    $e^y$
  • D
    $e^{-y}$

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