Question

Which is the definition of telegraphy?
O the science of creating sound waves using pulses in a symbolic code
O the transmission of radio waves that get converted back into sound waves at the receiver
O the transmission of signals using light waves from things such as lighthouses
O the science of using or making communication systems to transmit or reproduce information
GPT 3.5
O the science of using or making communication systems to transmit or reproduce information

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