The three sides of a triangle are given by $(x^2+7xy+2y^2)(y-1)=0$. Then the centroid of that triangle is

  • A
    $(\frac{2}{3}, 0)$
  • B
    $(\frac{7}{3}, \frac{2}{3})$
  • C
    $(\frac{-7}{3}, \frac{2}{3})$
  • D
    $(\frac{1}{3}, \frac{4}{3})$

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