The spectrum of the samples of a bandlimited signal after id

The spectrum of the samples of a band-limited signal after ideal sampling is:? a. Exactly the spectrum of the original signal before sampling. B the inverse of the spectrum of the signal. C. the repearts of the spectrum of the original signal that repeats with sampling frequency. D the spectrum of the sampler impulse train.

Solution

the repearts of the spectrum of the original signal that repeats with sampling frequency.