In MODEMS

A. Several digital signals are multiplexed

B. A digital signal changes some characteristic of a carrier wave

C. Digital signal is amplified

D. All of the above

E. None of the above

Answer: Option B

Solution(By Examveda Team)

A modem is a device or program that enables a computer to transmit data over, for example, telephone or cable lines. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves.

Source : webopedia.com