The abscissa of the points,where the tangent to the curve $y=x^3-3x^2-9x+5$ is parallel to the $X$-axis,are

  • A
    $x=1$ and $-1$
  • B
    $x=1$ and $-3$
  • C
    $x=-1$ and $3$
  • D
    $x=0$ and $1$

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