Discussion
Which multiplexing method suits a channel with a wide bandwidth but poor linearity?
Answer: C
Time division multiplexing keeps only one channel present at any instant, so non-linearity cannot mix the channels together - the intermodulation that plagues frequency division multiplexing simply has nothing to work on. Frequency division needs good linearity precisely because all channels coexist. Wavelength division is the optical analogue of frequency division. And code division shares both time and frequency. Whether channels coexist or take turns decides how much linearity a system demands.
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