The displacement of a particle moving in a straight line depends on time as $x = \alpha t^3 + \beta t^2 + \gamma t + \delta$. The ratio of initial acceleration to its initial velocity depends on:

  • A
    only on $\alpha$ and $\gamma$
  • B
    only on $\beta$ and $\gamma$
  • C
    only on $\alpha$ and $\beta$
  • D
    only on $\alpha$

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