$1 + \frac{1 + 2}{1!} + \frac{1 + 2 + 3}{2!} + \frac{1 + 2 + 3 + 4}{3!} + \dots \infty = $

  • A
    $0$
  • B
    $1$
  • C
    $\frac{7e}{2}$
  • D
    $2e$

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