Extra exam question E7F08

WhyDecimation reduces the effective sample rate of a signal by removing samples. Decimation reduces a signal's effective sample rate by systematically discarding some of the samples after they've already been captured at a higher rate, typically done after filtering to avoid aliasing, letting later processing stages work with a lower, more manageable data rate, answer B. It isn't converting data to binary-coded decimal, isn't a way of attenuating the signal itself, and isn't about removing insignificant digits from individual sample values, those aren't what decimation refers to.