Discussion
Which is the correct description of FM's spectrum occupancy compared with AM's?
Answer: C
For the same audio, wideband FM occupies 180 kHz against AM's 10, roughly twenty times as much, which is the price of its noise advantage and the reason it lives at very high frequency. Its carrier is not suppressed. Carrying the same audio does not imply the same bandwidth, since FM's deviation rather than its audio sets the width. And the mono transmission is already wide, stereo adding baseband content rather than extra deviation. Quantifying the trade is what makes it memorable.
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