For all $n \in \mathbb{N}$,if $1^2+2^2+3^2+\ldots+n^2 > x$,then $x=$

  • A
    $\frac{n^3}{3}$
  • B
    $\frac{n^3}{2}$
  • C
    $n^3$
  • D
    $\frac{n^4}{4}$

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