Respuesta :
Correct answer choice is :
Radio
Explanation:
Radio is the technology of utilizing radio waves to carry data, such as sound, by regularly changing characteristics of electromagnetic energy waves conveyed through space, such as their amplitude, wavelength, phase, or pulse width. When radio waves hit an electrical wire, the oscillating tracks produce an alternating current in the conductor. The data in the waves can be obtained and converted back into its initial form.
The radio was the form of entertainment that helped to popularize ragtime and jazz in the early 1900s.
How did radio helped ragtime and jazz music?
The radio does organized some music shows that promotes the artist and this led to the popularization of the ragtime and jazz in the early 1900s.
Hence, the medium was communication form that helped to popularize ragtime and jazz in the early 1900s.
Therefore, the Option C is correct.
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