Discussion
Which sensor triggers automatic headlamps?
Answer: D
A combined rain and light sensor at the mirror mounting reads ambient and forward light. Cameras genuinely contribute to lighting decisions on vehicles with driver assistance, which makes the second option a real input. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. The shared behaviour explains why these belong together and the differences explain why both exist. Reading the definition literally, rather than recalling a summary, avoids the usual confusion.
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