If the quadratic equation $ax^2+bx+c=0$ $(a>0)$ has two roots $\alpha$ and $\beta$ such that $\alpha < -2$ and $\beta > 2$,then which of the following is true?

  • A
    $c < 0$
  • B
    $a+b+c > 0$
  • C
    $a-b+c < 0$
  • D
    $a-b+c > 0$

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