Fact 1: Atelephone is used for communication by humans over long distances. Fact 2: Communicating is as much about listening as it is about talking. Given the two facts above, people can listen and talk to each other over long distances using what?
OPT:
A). Neuron.;
B). power;
C). microscope;
D). microphone;
E). electricity;
F). dictaphone;
G). telephone;
H). waves;
Answer:
G).