The equation of the pair of straight lines joining the origin to the points of intersection of the curve $x^2 + y^2 = 4$ and the line $y - x = 2$ is

  • A
    $x^2 + y^2 = (y - x)^2$
  • B
    $x^2 + y^2 + (y - x)^2 = 0$
  • C
    $x^2 + y^2 = 4(y - x)^2$
  • D
    $x^2 + y^2 + 4(y - x)^2 = 0$

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