From the origin,chords are drawn to the circle $(x - 1)^2 + y^2 = 1$. The equation of the locus of the midpoints of these chords is:

  • A
    $x^2 + y^2 - 3x = 0$
  • B
    $x^2 + y^2 - 3y = 0$
  • C
    $x^2 + y^2 - x = 0$
  • D
    $x^2 + y^2 - y = 0$

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