If the eccentricity of the hyperbola $\frac{x^2}{a^2} - \frac{y^2}{b^2} = 1$,passing through $(6, 4\sqrt{3})$,satisfies $15(e^2 + 1) = 34e$,then the length of the latus rectum of the hyperbola $\frac{x^2}{a^2} - \frac{y^2}{2(a^2 + 1)} = 1$ is:

  • A
    $\frac{20}{3}$
  • B
    $\frac{40}{3}$
  • C
    $25$
  • D
    $30$

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