The zeros of the cubic polynomial $p(x) = ax^3 + bx^2 + cx + d$; where $a \neq 0$ and $a, b, c, d \in R$,are $\alpha, \beta$,and $\gamma$. Then $\alpha + \beta + \gamma = \ldots$

  • A
    $\frac{a}{b}$
  • B
    $\frac{b}{a}$
  • C
    $-\frac{b}{a}$
  • D
    $-\frac{c}{a}$

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