$G(1,0,1)$ is the centroid of the triangle $ABC$. If $A=(1,-4,2)$ and $B=(3,1,0)$,then $AG^2+CG^2=$

  • A
    $BG^2$
  • B
    $2 BG^2$
  • C
    $6 BG^2$
  • D
    $5 BG^2$

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