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Which system maintains a set distance from the vehicle ahead?

  • A.Lane keeping
  • B.Cruise control using radar or camera input to adjust the speed so a chosen following distance is maintained
  • C.Adaptive cruise control
  • D.Conventional cruise control, which holds a set speed and therefore maintains the distance to the vehicle ahead

Answer: C

Adaptive cruise measures the gap and adjusts speed to hold it. The last option describes exactly that, which makes it a correct and more detailed version. Conventional cruise holds speed regardless of traffic. Tracing the requirement back to the physical constraint that produces it makes the answer follow. The order in which the effects act is what decides the outcome, so it is worth establishing first. The shared properties explain why these belong to one family, and the differences explain why more than one exists.

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