The centroid of the triangle formed by the lines $x+3y=10$ and $6x^2+xy-y^2=0$ is

  • A
    $\left(\frac{1}{3}, \frac{-7}{3}\right)$
  • B
    $\left(\frac{-1}{3}, \frac{-7}{3}\right)$
  • C
    $\left(\frac{-1}{3}, \frac{7}{3}\right)$
  • D
    $\left(\frac{1}{3}, \frac{7}{3}\right)$

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