What is the function of a modem in a standard PC unit?

A) converts digital signals to analog
B) decodes analog signals to digital
C) transmits analog signals to telecommunications system
D) all of the above

Modem

Telecommunications device that translates digital signals to analog for transmission.

Digital Signals

Electronic signals that represent data as sequences of discrete values, typically represented by binary code.

Analog Signals

Continuous signals that vary over time and can represent information such as temperature, sound waves, or electrical voltage.