Answer the following question: Fact 1: Atelephone is used for communication by humans over long distances. Fact 2: Long-distance telephone calls can also use radio waves or microwaves. Given the two facts above, what waves does a telephone use?

Options are: (a). unique (b). power (c). energy (d). fibers (e). sound (f). strong (g). Radio (h). two
Answer:
(g).