(13
Answer (Choose 1 answer)
What does the communications spectrum include?
A. Networks that allow multiple users to share peripheral devices, such as printers, and to access software stored on a shared file server.
B. Systems that transmit information between relay towers on highly focused beams of radio waves.
C. The range of electromagnetic radiation frequencies that are used in wireless communication systems.
D. Systems that send information back and forth to relays in orbit around the earth.
