$\lim _{n \rightarrow \infty} \frac{2^2+4^2+6^2+\ldots+(2 n)^2}{n^3} = $

  • A
    $\frac{2}{3}$
  • B
    $\frac{4}{3}$
  • C
    $\frac{3}{2}$
  • D
    $\frac{8}{7}$

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