Discussion
In what order does the audio chain run?
Answer: D
Pre-emphasis comes first and limiting second, because boosting the treble increases deviation and the limiter must see the signal that will actually be transmitted. Reversing them would let pre-emphasis push the peaks back over the limit. De-emphasis belongs in the receiver, not the transmitter. And limiting at the microphone would control level rather than deviation. The order follows from what each stage assumes about its input. Reading the definition literally, rather than recalling a formula, is the reliable route through questions of this shape.
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