$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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