$\frac{1}{1 \times 2} + \frac{1}{2 \times 3} + \frac{1}{3 \times 4} + \dots + \frac{1}{n(n + 1)} = \dots$

  • A
    $\frac{1}{n(n + 1)}$
  • B
    $\frac{1}{n + 1}$
  • C
    $\frac{n}{n + 1}$
  • D
    $\frac{n+1}{n}$

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