If the slope of one of the lines given by $K x^2 + 6 x y + y^2 = 0$ is three times the other,then the value of $K$ is:

  • A
    $\frac{9}{4}$
  • B
    $\frac{4}{9}$
  • C
    $\frac{27}{4}$
  • D
    $\frac{4}{27}$

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