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Which feature keeps the headlamps lit after the vehicle is parked?

  • A.A follow me home function
  • B.A delay circuit within the lamp unit, which discharges a capacitor and therefore keeps the lamps illuminated briefly
  • C.Nothing
  • D.A timer within the body controller, which extinguishes the lamps after a period in order to protect the battery

Answer: A

Follow me home lights the way to the door for a minute or two after locking. The last option describes exactly the mechanism by which it is implemented and terminated, which makes it a strong distractor rather than a wrong answer. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. Most errors here come from carrying across a result from a neighbouring case where it does not hold.

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