Which of the following describes a "low-frequency cutoff" in a filter?

A) The frequency below which all signals are attenuated

B) The frequency at which the signal amplitude is zero

C) The frequency above which all signals are passed

D) The maximum frequency that can be processed

Answer: A) The frequency below which all signals are attenuated

Explanation: A low-frequency cutoff is the point at which frequencies below that threshold are significantly attenuated in a low-pass filter, affecting how the filter processes input signals.