If $\alpha$ and $\beta$ are roots of the equation $x^2 + px + \frac{3p}{4} = 0,$ such that $|\alpha - \beta| = \sqrt{10},$ then $p$ belongs to the set

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

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