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Digital data buses replaced point-to-point analogue wiring largely because they

  • A.Many parameters share one pair
  • B.Are faster to install by hand
  • C.Require no shielding
  • D.Eliminate the need for software

Answer: A

A single twisted pair can carry hundreds of parameters where each once needed its own wire. On a transport aircraft the saving runs to hundreds of kilograms, which is why the change happened despite the added complexity.

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