Answer: Option A
Answer: (a)
Microwaves are radio waves, while the rest three are some form of cables.
Coaxial cable: a kind of copper cable used between the community antenna and user homes and businesses;
Optical fiber: a flexible, transparent fibre made of glass or plastic; and
Twisted pair cable: a type of wiring in which two conductors of a single circuit are twisted together for the purposes of cancelling out electromagnetic interference (EMI) from external sources.