The correct answer is A. Magnetic tape.
A magnetic tape is a data storage medium that consists of a thin, magnetizable plastic film coated with iron oxide particles. Data is recorded on the tape by magnetizing the particles in specific patterns. Magnetic tape is used in a variety of applications, including computer data storage, audio recording, and video recording.
A voice response unit is a device that produces audio output in response to user input. The input can be from a keyboard, a microphone, or another device. Voice response units are used in a variety of applications, including telephone answering systems, voice mail systems, and interactive voice response systems.
A voice recognition unit is a device that converts spoken words into text. The input can be from a microphone or another device. Voice recognition units are used in a variety of applications, including dictation, voice control, and speech recognition.
A voice band is a range of frequencies that is used for voice communication. The voice band is typically 300 to 3400 Hz. Voice bands are used in a variety of applications, including telephone communication, radio communication, and television communication.
E is not the correct answer because it is not a device that uses words or messages recorded on a magnetic medium to produce audio response.