If ${(1 + x)^n} = {C_0} + {C_1}x + {C_2}{x^2} + .... + {C_n}{x^n}$, then the value of ${C_0} + 2{C_1} + 3{C_2} + .... + (n + 1){C_n}$ will be

  • [IIT 1971]
  • A

    $(n + 2){2^{n - 1}}$

  • B

    $(n + 1){2^n}$

  • C

    $(n + 1){2^{n - 1}}$

  • D

    $(n + 2){2^n}$

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