________ transmission systems are relatively inexpensive but must have unobstructed line of sight.

A) Fiber
B) Microwave
C) Radio
D) Satellite

Line Of Sight

A direct visual path between a transmitting and receiving antenna, used in various communication and telecommunication systems, necessary for effective signal transmission.

Radio

A technology that uses radio waves for communication by transmitting and receiving sounds, such as music and voice, over distances without wires.

Satellite

An artificial object placed into orbit around the Earth or another planet in order to collect information or for communication.