Let $\theta \in [0, 4\pi ]$ satisfy the equation $(\sin \theta + 2) (\sin \theta + 3) (\sin \theta + 4) = 6$. If the sum of all the values of $\theta$ is of the form $k\pi$,then the value of $k$ is:

  • A
    $6$
  • B
    $5$
  • C
    $4$
  • D
    $2$

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