If $\theta$ denotes the acute angle between the curves $y=10-x^2$ and $y=2+x^2$,at a point of the intersection,then $|\tan \theta|$ is equal to

  • A
    $\frac{8}{15}$
  • B
    $\frac{8}{17}$
  • C
    $\frac{4}{9}$
  • D
    $\frac{7}{17}$

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