If $x=10.0 \pm 0.1$ and $y=10.0 \pm 0.1$, then $2 x-2 y$ is equal to
  • A$(0.0 \pm 0.4)$
  • B$0$
  • C$(0.0 \pm 0.1)$
  • D$(20 \pm 0.2)$
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