Question

what is a key characteristic of a digital signal? it uses a limited number of values, like on or off. it sends information in a continuous, unbroken stream. it can have an infinite number of values. it is made of complex sound waves.

Explanation:

Digital signals are discrete, meaning they rely on a fixed, limited set of distinct values (often binary: on/off, 1/0) to transmit data. In contrast, continuous, infinite values describe analog signals, and sound waves are analog by nature.

Answer:

A. It uses a limited number of values, like on or off