Which best explains how fiber-optic technology has improved communication?

a it has eliminated the need to send audio data through telephones.
b. it hawhich best explains why one laser beam might appear blue and another laser beam might appear red
c. the energy in laser beams is concentrated. the energy in laser beams is scattered.
d. each laser beam is made up of all visible wavelengths of light.
e. each laser beam is made up of one specific wavelength of light.