If $\alpha, \beta, \gamma$ are the roots of $x^3+2x+5=0$,then $\sum \frac{\beta+\gamma}{\alpha^2} = $

  • A
    $-\frac{2}{5}$
  • B
    $\frac{1}{5}$
  • C
    $\frac{2}{5}$
  • D
    $-\frac{3}{5}$

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