For all $n \in N$,if $1^3+2^3+3^3+\ldots+n^3 > x$,then a value of $x$ among the following is

  • A
    $\frac{n^2}{4}$
  • B
    $n^2$
  • C
    $n^4$
  • D
    $\frac{n^2(n+1)^2}{4}$

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