The reason modulation is used in electronic communication is:
A) Efficient transmission and reception of radio waves are not possible unless extremely large antennas are used.
B) Since all intelligence signals occur at approximately the same frequency, there would be catastrophic interference problems if these frequencies were used.
C) Audio frequency radio waves do not propagate long distances very reliably
D) All of the above

Question

Quizplus · Accepted Answer

Modulation is used for efficient transmission and reception, to avoid interference by allowing the use of different frequencies, and because audio frequencies do not propagate well over long distances. All these reasons contribute to the necessity of modulation in electronic communication.

The Reason Modulation Is Used in Electronic Communication Is