Final answer:
Decreasing bandwidth from 52 kHz to 35 kHz leads to sampling of a narrower range of precessional frequencies, which typically results in an increase in SNR, thus the answer is C) Narrow, Increase.
Step-by-step explanation:
Decreasing bandwidth from 52 kHz to 35 kHz means that a narrower range of precessional frequencies will be sampled. This is because bandwidth is directly related to the range of frequencies that can be captured. A decrease in bandwidth means that fewer frequencies are included, resulting in a narrower frequency range. As for the signal-to-noise ratio (SNR), when a narrower range of frequencies is sampled, typically the SNR increases because less noise is being integrated over a smaller frequency range. Therefore, the correct answer to this question is C) Narrow, Increase.