If Rolle's theorem holds for the function $f(x)=x^{3}-ax^{2}+bx-4$ on the interval $x \in [1, 2]$ with $f^{\prime}\left(\frac{4}{3}\right)=0$,then the ordered pair $(a, b)$ is equal to

  • A
    $(5, 8)$
  • B
    $(-5, 8)$
  • C
    $(5, -8)$
  • D
    $(-5, -8)$

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